Cleaning your sauna isn't just about appearances. Regular maintenance protects the wood, extends the lifespan of your sauna and ensures a hygienic space to unwind.
Sweat, moisture and natural oils can gradually build up on the surfaces. Without regular cleaning, this can lead to stains, unpleasant smells and even long-term damage to the wood. A clean sauna also heats more efficiently and feels more inviting, just as it should.
How often should you clean your sauna?
The more you use your sauna, the more often it needs a little attention. A simple routine can keep it in great condition:
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After each use: Quick wipe down and ventilation
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Weekly: A deeper clean of benches, walls, and floors
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Monthly: Inspection and cleaning of the heater and stones
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Annually: Full maintenance check and wood care
Building these habits into your routine means your sauna will stay fresh without ever feeling like a chore.
Cleaning after each session
After each sauna session, wipe down the benches, backrests and walls using a soft, damp cloth. It's best to avoid using too much water - the goal is to remove moisture without soaking the wood.
Leave the sauna door open after use to let fresh air circulate. Proper ventilation is one of the easiest ways to prevent lingering moisture and musty smells.
Using towels or seat covers while you’re in the sauna will also protect the wood from sweat and oils, making everyday cleaning even easier.
Weekly sauna care
Each week, it's worth setting aside a little more time for a deeper clean. Here’s how to keep everything looking and feeling its best.
Sweep or vacuum the floor
Dust and dirt naturally settle over time, especially in the corners and under the benches. Give the floor a good sweep or use a vacuum cleaner with a soft brush attachment to clear away loose debris.
Keeping the floor clean not only looks better but also helps protect the wood over time.
Clean the benches, walls and controls
Mix a gentle solution of warm water and white vinegar, or use a mild, sauna-safe cleaner. Using a soft cloth, wipe down all the interior surfaces, including the benches, walls, backrests, door handles and any control panels.
Stick to natural cleaning products wherever possible. Harsh chemicals can seep into the wood and release harmful fumes when the sauna heats up.
Check the heater and stones
If you have a traditional wood-burning stove, remove any ash build-up after a few uses. For electric heaters, gently brush away any dust and debris.
Take a look at the heater stones too. Rotate them occasionally to maintain even airflow, and replace any stones that are cracked or crumbling.
Dealing with stains and odours
Even with regular cleaning, you might notice the occasional stain or lingering smell. Here's how to tackle them gently.
Removing stains
If you spot any sweat stains or discolouration, start by cleaning with your usual vinegar solution. For stubborn stains, lightly sand the area with fine-grit sandpaper (around 150–180 grit), then wipe away any dust with a damp cloth.
Avoid scrubbing too hard or using heavy-duty cleaning products. Gentle care will protect the wood’s natural finish.
Freshening the air
After each use, allow the sauna to air out fully. If a musty smell persists, wipe the surfaces with a light lemon water solution or use a few drops of natural essential oils like peppermint, birch or lavender during your next session.
Stick to natural fragrances rather than chemical air fresheners, which can clash with the sauna’s natural atmosphere.
How to care for sauna wood
The timber inside your sauna is specially chosen for its ability to handle heat and moisture, but it still needs the right care.
Avoid varnishing, staining, or painting the interior wood. These treatments stop the wood from breathing properly and can cause cracking, warping, or even toxic fumes when heated.
Instead, simply stick to regular cleaning with mild solutions. For outdoor saunas, you can treat the exterior wood once a year with a breathable oil designed for outdoor timber, helping it withstand the elements.
Always avoid pressure washers, hoses or soaking the wood - excess moisture is the enemy of a healthy sauna.
Tips for keeping your sauna cleaner for longer
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Shower before your session to remove oils, dirt, and sweat.
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Always sit on a towel or seat cover to protect the benches.
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Leave shoes and damp swimsuits outside to keep the sauna clean and dry.
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Rotate towels and seat covers regularly to maintain freshness.
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Inspect heater stones and ventilation every few months to catch any issues early.
Simple habits like these will make a huge difference over time.
FAQs
Can I paint or varnish the inside of my sauna?
No. The interior wood needs to stay untreated so it can breathe naturally. Varnishes and paints can damage the wood and create toxic fumes when heated.
What’s the best cleaner for a sauna?
Use a mild, non-toxic solution like vinegar and water, or a sauna-specific cleaner. Avoid harsh chemicals.
How do I prevent sweat stains on benches?
Always use a towel or a dedicated sauna seat cover during your sessions. It’s the easiest way to keep the wood clean and stain-free.
Should I clean my sauna while it’s still warm?
No. Always let the sauna cool down before cleaning. Cleaning while it’s hot can cause surface damage and makes it less safe for you.
How do I protect an outdoor sauna?
Treat the exterior wood once a year with a breathable wood oil. Always let the sauna dry fully after rain, and check seals and doors regularly.
Taking a little time to care for your sauna keeps it looking beautiful, performing at its best, and ready for many more years of relaxation.
Regular cleaning, natural products and good habits are the secret to a sauna that always feels fresh and inviting.
At Soco Saunas, we believe the best wellness rituals start with good foundations - and that includes the space you enjoy them in.
