How to maintain and clean your sauna properly

Maintaining your sauna is essential for its longevity, safety and the quality of your experience. While many guides focus on how to use the sauna, this practical and comprehensive guide will focus on maintenance — from cleaning the wood surfaces and preventing mould to checking the heaters and making sure everything works safely. Whether you have a traditional Finnish sauna fired by wood or electricity (or even an infrared model), these maintenance tips apply. We've gathered insights to help sauna owners across Europe, from the cold north to the warm south, keep their saunas in great condition.

After every session: a quick clean and dry

After each session, a quick wipe-down of the benches and walls removes sweat and moisture, preventing stains and mould.

A little care every time you use the sauna can significantly reduce long-term maintenance. Start by using towels on the benches and floor during your session — this absorbs sweat and protects the wood from staining[1][2]. When you're finished, wipe down the benches, backrests and walls with a damp cloth or a soft brush (keep one in the sauna for this purpose). Scrubbing every surface with warm water for 30 to 60 seconds is enough to remove sweat and dirt, and doing this every time will keep the wood looking great for years[3].

Next, dry the sauna. Leave the door (and all the air vents) open for a while after use to let the moisture escape[4][5]. If you have slatted floor mats, lift them so the air can circulate underneath[6]. The residual heat in the stones and wood will help the interior dry out fully. With a wood-burning sauna, you can let the fire die down with the door ajar; with an electric sauna, you can leave the heater on for a few more minutes (or simply rely on the residual heat) to make sure everything dries. Never leave wet towels or rugs inside the sauna — hang them to dry elsewhere to prevent mildew[7]. These simple after-use habits — wiping the surfaces, removing wet textiles and airing the room — go a long way towards preventing mould and damage.

Routine cleaning and wood care

Even with good after-use habits, you'll need to do routine cleaning based on how often the sauna is used. For a sauna used regularly (several times a week), a monthly clean is advisable[8]. For less frequent use, aim for at least one or two deep cleans a year[9], with light cleaning in between as needed.

Cleaning wood surfaces: When it's time for a full clean, always start with the sauna cooled down and switched off (never try to clean while it's hot)[10]. Remove all accessories (buckets, thermometers and so on) and, if possible, the removable bench sections. Vacuum or sweep the floor and between the bench slats to gather dust, dirt and hair[11]. Use a soft brush to dust the walls and even the ceiling — over time, dirt can build up on every surface[11].

To wash the wood, use warm water with a mild cleaner. Ideally, choose a cleaner made for saunas or a mild, non-toxic detergent[12][13]. Traditional Finnish guidance recommends products such as Supi Saunapesu (a sauna cleaning agent) or a simple solution of water and vinegar, since regular household cleaners may be too weak or contain ingredients unsuitable for sauna wood[13]. Avoid harsh chemicals or disinfectants on sauna wood; in particular, do not use chlorine bleach or any chlorine-based cleaner regularly. Chlorine can soak into the wood and later release toxic vapours when the sauna is heated[14]. (Exception: small amounts of diluted bleach can be used to treat mould stains — more on that below.) Also avoid painting, varnishing or sealing the interior wood: sauna wood is left untreated so it can breathe and withstand the heat and humidity; paints or varnishes block the pores, can overheat the surface and may even release odours or fumes when heated[15]. The only places where you can apply a wood finish are high-wear points such as floor boards or door handles, where a polyurethane or sealer can make cleaning easier[16] — but for every other surface, keep the natural wood finish.

When scrubbing wooden benches or walls, use a soft brush or sponge and clean along the grain of the wood to avoid scratches[17]. It's often recommended to wash from the bottom up on vertical surfaces — this helps avoid drip marks of dirt running over already-clean areas[18]. After gently scrubbing every surface with the cleaning solution, rinse the wood with clean water (cold water helps close the wood pores after cleaning)[19]. If your sauna has a floor drain, remember to flush and clean it during this process so it doesn't get blocked with debris[20]. After washing, ventilate and dry the sauna thoroughly: leave the door open and, if it's an electric sauna, you can switch the heater on at a low setting for 15 to 30 minutes to help it dry[21]. With a wood-burning sauna, you can light a small fire or simply make sure there's good airflow on a warm, low-humidity day. The key is to make sure all the moisture evaporates.

Stubborn stains and refreshing the wood: Over time, wooden benches can develop dark spots from oils or simply from normal wear. Light sanding is an excellent way to refresh sauna wood. Use fine-grit sandpaper to sand any stained or rough areas (hand sanding is usually enough). This removes a very thin layer of wood, taking the stains with it and revealing fresh wood underneath. Sauna specialists suggest lightly sanding the benches about once a year to keep them smooth and bright[22]. After sanding, remember to sweep or vacuum up all the dust[23]. You can leave the sanded wood as it is or apply a special sauna wood oil or wax. In Finland, it's common to treat clean sauna wood with products such as paraffin oil or sauna wax, which are designed for sauna temperatures[24][25]. These breathable wood preservatives soak into the wood without sealing it, adding a moisture- and dirt-repellent layer that makes future cleaning easier[26][25]. For example, a sauna wood wax can be applied to wall and ceiling panels to protect against moisture and mould (these often contain mild fungicides), and a separate bench oil (such as Tikkurila's Supi Laudesuoja) can be used on the benches to repel dirt[25]. Always apply these oils or waxes in a thin, even coat along the grain and wipe off any excess. Never use ordinary paint or polyurethane varnish on sauna walls or benches[25] — if you want to treat the wood, use sauna-specific products.

By cleaning and caring for the wood regularly, you'll prevent deterioration. Remember that sauna wood ages naturally: over time and with heat, it can darken slightly, or fine cracks may appear from the extreme temperature swings[27]. This is normal and not a structural problem, especially if you avoid letting the wood dry out too much (which is the upside of using sauna oils) and avoid pouring water on the walls or ceiling. Ultimately, well-cared-for wood not only lasts longer but also stays hygienic and odour-free, making each sauna session better.

Preventing mould and odours

Saunas are humid environments, so without the right care they can develop mould, mildew or unpleasant smells. Prevention is far easier than cleaning, so put a few habits in place to keep your sauna clean and dry.

Ventilation is essential: Make sure your sauna has proper airflow. Typically, a sauna should have an air-intake vent near the floor (often below the heater) and an air-outlet vent higher up, usually on the opposite wall near the ceiling[28]. These vents allow gentle air exchange while the sauna is in use and, more importantly, help dry the sauna afterwards. Make sure the vents are clear and clean — check them periodically for dust or dirt build-up and clean them if needed[29]. For outdoor saunas or sauna rooms that tend to feel damp, consider leaving the vent open after a session, or even using a small fan to circulate air after the sauna is used[29]. Good ventilation and a drying period between uses will prevent mould growth on the wood surfaces[30].

Dry everything thoroughly: as mentioned above, after every session you should dry the room by leaving the door open and/or running the heater for a few minutes. The aim is to avoid any residual moisture. Wipe up any pools of water (for example, if water splashes on the floor) and make sure the benches are dry. It's good practice to lift any removable mats or duckboards so the floor can air-dry from every side[6]. Many sauna owners in Finland even mop up excess water and then heat the sauna for a few minutes with the door closed and the vent open, to "bake" it dry. Never store wet items in the sauna: as well as attracting mould, a wet towel in a hot, enclosed space can grow bacteria and cause bad smells. (And as a safety note, do not use the sauna as a clothes dryer — hanging wet laundry inside a sauna is a fire risk if someone accidentally switches it on[31].)

Regular mould checks: Inspect the sauna from time to time, especially in the hidden corners. Common spots for the first signs of mould or mildew are under the benches, in the corners or around the floor boards, where water can sit or ventilation is weaker[30]. If you find dark patches or a mouldy smell, treat them straight away. For mild mould, a solution of warm water with a neutral detergent or vinegar can do the job — scrub the affected wood with a soft brush, rinse and dry. For more stubborn mould or algae, a stronger method may be needed. A traditional remedy is a diluted bleach solution (for example, about 1/4 cup of bleach to a gallon of water) carefully applied to the mouldy area[32]. Scrub the area with this solution, rinse well with clean water and then dry the sauna thoroughly (run it on its highest setting with the vents open for a while) so no bleach is left trapped in the wood[32]. Always use bleach sparingly and with good ventilation, since you don't want the chlorine smell to linger. Alternatively, there are commercial sauna cleaners with fungicidal ingredients that are safe for the wood — these can be used as instructed to clear mould. After cleaning the mould, it's wise to lightly sand the area once it has dried (mould can leave stains) and then treat the wood with a sauna oil or wax that contains mould inhibitors[25]. This will help prevent it from coming back.

To keep your sauna smelling fresh, remember the basics: shower before the sauna (less dirt and sweat brought in means fewer odours)[33], use clean towels to sit on, and air the sauna out after every session. Occasionally, you can wipe surfaces with a baking soda and water solution, or leave a bowl of baking soda in the sauna when it isn't in use — baking soda absorbs odours. Some sauna owners also heat the sauna and then air it out as a way to "reset" the smell if it's stale (the heat can draw odours out of the wood, then fresh air clears them away). The good news is that a dry sauna is a hostile environment for mould. In fact, using the sauna often can help keep it mould-free — the high heat dries the wood out regularly, stopping mould from taking hold[34]. So consistent use combined with diligent drying is a natural mould deterrent.

Heater and sauna stone maintenance

The heater is the heart of your sauna, especially in traditional Finnish saunas. Whether you have an electric heater with sauna stones or a wood-burning heater, giving it a little attention will keep things safe and performing at their best.

General safety first: Always cut the power to an electric heater before any maintenance and let it cool down. With wood-burning heaters, make sure the fire is out and everything is cold before handling ash or stones.

Electric sauna heaters: These usually need very little maintenance beyond cleaning and looking after the stones. Every so often (roughly once a month under heavy use, or at least a few times a year), vacuum or wipe down the heater to remove lint, dust or debris that may have fallen onto it[35]. Pay special attention to the area around the heating elements and the underside of the heater, where dust can collect. Make sure the heater's air intakes are unobstructed — blockages can cause overheating. It's also a good idea to check the electrical connections (if you're qualified to do so, or have an electrician check during annual servicing) and test the controls and thermostat from time to time to make sure the temperature sensors and timers are working correctly[36]. Modern electric heaters are very robust, but any sign of trouble — such as not reaching the set temperature, tripped breakers or unusual smells — should be inspected by a professional immediately.

Wood-burning sauna heaters: These need a little more upkeep because of the combustion. Empty the ash pan and the firebox regularly — ideally after every use (once the ashes are completely cold) or at least after a few sessions. A layer of ash left to build up can absorb moisture and corrode the heater, and excess ash can block the airflow for the next fire. Use a metal ash shovel and bucket to remove ashes safely. In addition, check inside the heater and the chimney for soot or creosote build-up. Especially if you burn resinous wood or use the sauna often, soot can build up in the flue. Excess creosote is a fire risk. We recommend inspecting and cleaning the chimney at least once a year (more if you notice heavy build-up) — you can use a chimney brush or hire a professional chimney sweep. Make sure the chimney cap is in place to keep rainwater out and that any spark-arrestor screens are not clogged. While you're at it, inspect the heater door and seals: if your wood-burning heater has a glass door, keep it clean (soot can be removed with a damp newspaper or a special glass cleaner when the heater is cold); if there's a rubber gasket around the door, check that it's intact so the heater draws air correctly. Examine the metal body for signs of rust or cracks; heat-resistant paint can touch up exterior rust spots to prevent further corrosion. Also make sure that any heat shields around the heater are securely fixed and at the right distance from the walls — that's mainly an installation issue, but worth checking over time for safety.

Sauna stones (for both electric and wood-burning heaters): the stones in the heater are essential for retaining and spreading the heat evenly. Over time, these sauna stones can crack, crumble or become dusty from the heat. It's important to check their condition at least once a year[37]. Signs of trouble include weaker steam (löyly), longer heat-up times, or finding sand or grit at the base of the heater — these all point to stones breaking down[38]. To inspect them, first switch off the heater and let it cool. Then take the stones out into a bucket and look for any that are cracked, crumbling or noticeably smaller than they used to be. Discard the damaged stones and also vacuum out any stone dust from inside the heater housing[39]. This is vital because, in electric heaters, broken-down stone fragments can block the airflow around the heating element, causing the elements to overheat[40]. In fact, running a heater with badly broken-down stones can be a fire risk or cause the heater elements to burn out[41]. With wood-burning heaters, the stones tend to wear a little more evenly, but even so, the stones nearest the flame can break down faster[42].

Replace the discarded stones with new sauna-grade stones — only use stones recommended for saunas (typically igneous rocks such as peridotite or olivine-diabase)[43]. Never substitute random landscaping or river stones, as they can explode when heated. Before putting the stones back, rinse the good stones to remove any dust[44]. Then stack the stones loosely around the heating elements or inside the firebox, depending on the design. The idea is to leave gaps for airflow between the stones[44]. Don't pack them in too tightly, or the heater will struggle to breathe. Also avoid stacking stones above the recommended level — fully covering the heating elements without overflowing is generally the rule. Once-a-year stone maintenance is a good guideline; if you use the sauna very often (daily, for instance), consider checking the stones more frequently and, conversely, if you rarely use the sauna, the stones can last for many years. Just keep an eye out for those signs (crumbling pieces or reduced performance) as a cue to act.

Infrared sauna maintenance: If your sauna is an infrared model or has infrared panels, maintenance is a little different. There are no stones or high humidity to worry about, but you should keep the infrared heating panels clean, wiping them (when they're cold) with a soft, slightly damp cloth to remove dust. Make sure the electrical connections to each panel stay secure and check that every infrared panel is working (giving off heat evenly)[45] — if a panel fails, replace it according to the manufacturer's instructions. Infrared heaters generally last a long time, but it's wise to check annually for any issues with exposed wiring or the control system.

In every case, keep an eye out for anything unusual when running the heater. Strange noises, a burning smell or safety devices tripping should be investigated straight away. By keeping the heater and stones in good condition, your sauna will heat efficiently and safely, delivering the gentle heat and steam (in traditional saunas) that make the experience so enjoyable[46].

Caring for sauna accessories and fittings

Your sauna isn't just walls and a heater — it includes benches, doors, vents and accessories that also benefit from maintenance:

• Benches and backrests: these support the weight of users and go through constant heat-and-cool cycles. Inspect the benches regularly for signs of wear or weakness. Look for cracks in the wood or any wobble at the joints. At least once a year, check the screws or fixings that hold the benches and brackets in place[47]. Wood can expand and contract with the heat, which can loosen hardware over time. Tighten any loose screws or nuts to keep the benches firm and creak-free[47]. If a bench plank starts to crack or splinter, sand it smooth or replace it as needed to avoid injury (sitting on a splinter is no fun). And as mentioned, sanding and treating the benches with a suitable oil will refresh their look and help repel moisture and dirt going forward.
• Door care: Sauna doors, usually made of wood and glass, can shift or swell slightly with humidity. If you find that your sauna door is sticking or hard to close, identify where it's rubbing on the frame. You can sand down the high spots or edges a little for a smoother fit[48]. If the door tends to swing open on its own or doesn't close properly, check the alignment of the catch and hinges — sometimes adjusting the hinge or adding a thin washer or shim can improve closing[49]. Tighten any loose door hinges (if the screws have stripped the wood, you may need slightly larger screws or inserts)[50]. A well-fitting door not only keeps the heat in during use, but also closes firmly when not in use (stopping pets or children from wandering in and keeping the inside clean). If your door has a window, make sure the glass is firmly fixed in the frame and clean it with a glass cleaner when needed (only when the sauna is cold).
• Sliding vents: Many saunas have a wooden sliding vent. Over time, these can warp, or debris can stop them sliding smoothly. If a vent gets stuck, you can tighten the fixing screws slightly to give a little more clearance, or lightly sand the edges of the slider to reduce friction[51]. Make sure you can open and close the vents easily; if not, sort it out so ventilation isn't neglected because of a stubborn vent.
• Buckets, ladles and other accessories: empty the water bucket after every sauna session — don't leave water sitting in it for long periods, as it can encourage mould or even damage the wood of a wooden bucket. Dry the bucket and ladle well (turn them upside down to drain). Clean the sauna bucket and ladle regularly — a quick rinse and wipe-down is enough on most days and, occasionally, use mild soapy water to wash them and rinse well[52]. Wooden buckets can be a little more delicate, so avoid harsh chemicals. If you have a sauna brush or scrubber (for the skin or for cleaning), keep it clean and dry between uses. Thermometers and hygrometers should be checked for accuracy (an incorrect reading can lead to overheating the sauna or letting in too much steam without realising). Usually a quick dust is all that's needed; if they fog up or stop working, replace them.
• Lighting: If your sauna has a light fitting, make sure the bulb or LED is rated for high temperatures. From time to time, check the light cover (typically a glass or plastic shade) — wipe out any dead insects or dust on the inside (with the power off). If the bulb burns out, replace it straight away (sauna-rated bulbs are usually required). And make sure the seal on the fitting (such as a gasket that keeps steam out of the electrical parts) is still in good shape.
• Floor and drains: If your sauna floor is wooden duckboards, clean it from time to time — lift them and sweep or scrub the floor below. If it's a concrete or tiled floor, keep it scrubbed and check that any drains aren't blocked. A floor trap can give off odours if it dries out, so pour some water into it occasionally (when the sauna isn't in use) or make sure the water in the trap hasn't evaporated.
• Textiles: Towels, robes and rugs for the sauna deserve attention. Wash them regularly and use unscented detergents — strong fragrances from detergent or fabric softener can linger in a small, hot sauna, and some people are sensitive to that[53]. Using antibacterial or quick-drying fabrics for sauna textiles is a good idea[7]. For any fabric mats on the floor, make sure they're fully dry after use (hang them up) and free of dirt. Given the high humidity, think carefully about mats with a PVC or rubber backing — if water gets underneath, it can encourage hidden mould; wooden mats or simple breathable fabrics are preferable.

By paying attention to these small details, you make sure every part of your sauna is safe and comfortable. A broken thermometer or a wobbly bench may not seem critical, but quickly fixing these small things means your sauna is always ready and pleasant to use. On top of that, well-kept doors, vents and fittings reinforce the overall longevity of the sauna.


Saunamo Cube from a recent client rooftop installation

Considerations for outdoor saunas

If your sauna is outdoors (a free-standing sauna cabin or a barrel sauna in your garden, for example), there are a few extra maintenance points to consider. Outdoor saunas are exposed to the elements year-round, so on top of the interior, it's important to protect and check the exterior structure.

Outdoor saunas are subject to sun, rain and temperature swings, so look after the exterior wood and roof to protect your investment.

Exterior wood and weather protection: Most outdoor saunas are made from durable wood (cedar, spruce, pine and so on) that can withstand the outdoor conditions, but UV radiation and moisture will still cause ageing over time. To preserve the look of the exterior, you can choose to stain or oil the exterior wood. This is different from interior maintenance: you can paint or varnish the outside of a sauna (using a weatherproof varnish or paint) if you'd like, since you're not directly heating those exterior surfaces. A popular choice is a UV-protective varnish — this slows the ageing of the wood from sun exposure[54]. Always use a varnish or oil suitable for outdoor use and, where possible, one that lets the wood breathe (many outdoor wood stains are breathable). If you'd rather let the wood age naturally to a silvery-grey tone (common with cedar), that's also fine, but you should make sure the wood stays clean. At least once or twice a year, wash the outside of the sauna to remove dirt, pollen or algae. You can simply use a garden hose or, if the dirt is more stubborn, a pressure washer on a low setting can be used on the outer walls[55]. Be careful — high pressure can damage the wood fibre or the caulking. If you spot any signs of mould or algae outside, scrub them with a brush and a mild wood cleaner (the same way you would on a deck). Keeping the exterior walls clean and coated (with paint or oil) will prevent rot and keep the sauna looking good in your garden.

Roof and foundation: Check the roof of your outdoor sauna periodically. Remove leaves, pine needles or debris that may build up, especially in any gutters or around any chimney. Make sure the roofing material (tiles, metal and so on) is intact — a leaking roof can let water in and ruin the sauna interior. In snowy climates, clear heavy snow off the roof to reduce the load on the structure. For the foundation or base, make sure water drains away from the sauna. Pools of water or poor drainage around the base can let moisture seep into the foundation or the lower logs. If your sauna sits on a deck or paving, it's a good idea to take an annual look underneath to check for excess moisture or insect activity.

Chimney and heater (for outdoor wood-burning saunas): On top of the internal heater maintenance mentioned above, the chimney of an outdoor wood-burning sauna is fully exposed and can rust or be damaged by wind. Inspect the flue pipe for rust, especially at the joints, and repaint with heat-resistant paint if needed. Make sure the chimney cap is securely fixed (storms can knock it loose). Also be mindful of nearby trees — keep branches well trimmed to avoid any fire risk from sparks and to stop branches from striking the chimney or roof.

Pest prevention: An outdoor sauna can be appealing to small animals (in the off-season or when it isn't being used). Mice, insects or spiders may try to make a home of it. To prevent this, keep the door closed when the sauna isn't in use and consider mesh screens on any vents (without blocking airflow) to keep rodents out. Cedar and heat naturally repel many insects, but if you have a wasp or ant problem in your area, check the corners and under the benches occasionally for signs of infestation. Set traps or use natural repellents if needed.

Climate impact (Southern vs. Northern Europe): Saunas can be enjoyed all over Europe, but different climates bring different challenges. In warm, sunny Southern Europe, intense sun can quickly dry out and fade exterior wood — that's why a UV-protective varnish matters and why placing your sauna in a partially shaded spot may help. The warmer ambient temperature can mean the inside of your sauna dries faster (a plus for mould prevention), but it can also mean higher ambient humidity in some coastal areas, so always ventilate well. If you live in a region with hard water, take care when pouring water on the stones; hard water can leave mineral deposits (limescale) on the heater elements and stones. Over time, this limescale can reduce the heater's efficiency. Using filtered or soft water for the löyly (steam) or for cleaning can help. If limescale does build up, a mild acid such as vinegar can help dissolve it, or it may need to be sanded off, as some guides recommend[56]. In colder northern climates, the main concerns are freezing (don't leave water in buckets or pipes that could freeze and burst) and making sure the sauna is weatherproof against rain and snow. On top of that, sharp temperature changes can make the wood contract and expand more, so keep an eye on bench screws and joints for any looseness.

Indoor vs. outdoor: if your sauna is indoors, you don't need to worry about the weather, but pay attention to the room it's in — for instance, a sauna in the basement should have a vapour barrier and proper ventilation to the outside, to prevent moisture damage to the house. Many maintenance steps are similar (cleaning, drying and so on), but the outside of an indoor sauna (usually wall panels) may also need cleaning from time to time. And never store paints, chemicals or objects on top of an indoor sauna heater — it's easy for an indoor sauna to become a storage cupboard when it isn't in use, which is a safety hazard.

Special tips for sauna owners in warmer climates

If you live in a warm Mediterranean climate or anywhere in Southern Europe, here are a few extra tips to make sure your sauna stays a pleasure rather than a chore:

• Regular airing during quiet periods: in warm climates, you may not use the sauna as much over the summer months. Don't leave it shut for too long. Every now and then, open the door and vents to air it out, or even heat it briefly just to clear out any moisture that has crept in. This stops a musty smell from developing inside.
• Sun protection: as mentioned, the sun can be harsh on wood. Consider shading or covering your sauna during the hottest part of the day (even a removable shade sail or planting a tree nearby can help shield it). It also stops the sauna from heating up too much inside when it isn't in use. Some barrel sauna owners in sunny areas even put a reflective cover over the sauna when it isn't in use to reduce UV exposure — that's optional, but can help extend the life of the exterior.
• Check metal parts for corrosion: Near coastal areas with salty air, metal parts (hinges, handles, screws and even the heater's outer casing, if it isn't stainless steel) can corrode faster. Inspect them periodically. A light coat of machine oil on hinges, or occasionally swapping out fittings for stainless-steel equivalents, can save you headaches. Many quality saunas come with stainless-steel hardware, but it's worth checking.
• Fire safety in dry areas: If you use a wood-burning sauna in an area prone to drought or wildfires, take extra care with ashes and embers. Always use a spark arrestor on the chimney and dispose of ashes in a metal container away from combustible materials. In some places, there may even be regulations on when wood fires are allowed — always follow local guidelines.

By adapting to your climate and local conditions, you'll keep your sauna in great shape. Whether it's standing up to Nordic snow or the Iberian sun, a well-cared-for sauna will reward you with decades of relaxation.

Conclusion

A sauna is an investment in wellbeing and, like any investment, it's worth looking after. With regular maintenance — wiping the surfaces, drying after use, doing periodic deep cleans and looking after the heater and stones — your sauna will stay safe, clean and enjoyable for many years. Proper maintenance not only extends the life of your sauna, it also makes sure every session is as refreshing and hygienic as it should be[57]. In the spirit of Finnish sauna culture, a clean and well-kept sauna shows respect for the sauna and for everyone who uses it. By following the guidance above, you'll avoid common problems such as a musty smell, warped wood or a faulty heater. Instead, you'll have a sauna that's always ready to give you the perfect löyly and the relaxation you need, whenever you need it.

Hyviä löylyjä! (Enjoy your sauna.)

Sources:

• Finnish Sauna Builders – "Sauna Maintenance Tips: Essential Guidelines for Longevity." Practical tips on cleaning routines, protecting wood, and maintaining heaters[58][59].
• Finnleo Sauna – "Sauna Care and Maintenance." Official Finnish sauna company guidelines emphasizing not treating interior wood, quick after-use cleaning, and proper drying[15][60].
• Martat (Finnish Home Society) – "Saunan pesu." Traditional Finnish cleaning instructions, recommending warm water scrubbing, avoiding chlorine cleaners, and checking sauna stones annually[61][62].
• My Sauna World – "Extend Your Outdoor Sauna's Life." Tips focused on outdoor barrel saunas, including using towels, natural cleaning solutions, mold treatment, and exterior care like UV protection[63][64].
• Thermory – "Useful tips for sauna care and maintenance." Advice on treating sauna wood with breathable preservatives, gentle cleaning (no pressure washing), and tightening bench screws for longevity[26][25].

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