How to Clean a Sauna: Your Complete Maintenance Guide

Throughout many of our articles, we've touched on the importance of basic maintenance for your sauna. It's not just about preserving the beauty of your wellness sanctuary. It's about protecting your investment and ensuring every heat session feels as fresh and inviting as the first. A well-maintained sauna serves you faithfully for decades, while neglected one can develop problems that affect both your experience and your wallet.

We've found that many of our clients share the same questions about sauna care once their beautiful new space is installed. Since we build our business on being thorough and take great pride in every detail, we want to offer you our personal advice on how to clean your sauna properly. This article covers everything you need to know: from the supplies you'll need to the specific methods that work best for each component of your sauna.

Why Regular Sauna Cleaning Matters

Your sauna exists in a uniquely demanding environment. Heat, moisture, perspiration, and constant temperature fluctuations all take their toll on wood and other materials. Without regular attention, sweat and body oils can discolor benches, moisture can encourage mold growth, and accumulated dust can interfere with your breathing during sessions.

Regular cleaning preserves the integrity of the wood, maintains hygiene, prevents unpleasant odors from developing, ensures efficient heater performance, and creates an inviting space that you'll actually want to use. Think of it as an extension of the ritual itself. Caring for your sauna is part of the practice of wellness.

Essential Supplies for Cleaning a Sauna

The right tools make sauna maintenance simple and effective. Here's what you'll want to have on hand:

Cleaning Solutions

For Regular Cleaning:

• Warm water (often sufficient on its own)
• White vinegar (diluted 1:3 with water for light cleaning, 1:1 for tougher jobs)
• Baking soda (mixed into a paste or dissolved in water)
• Mild, natural dish soap (chemical-free)
• Lemon juice (natural deodorizer and light cleaner)

For Deep Cleaning:

• Specialized sauna cleaning products designed for wood (optional but effective)
• Hydrogen peroxide diluted with water (safe disinfectant for wood)
• Tea tree oil (natural antimicrobial properties)

Cost: Most natural cleaning supplies cost between $5-15 and last for many cleaning sessions. Specialized sauna cleaners typically range from $15-30 per bottle.

Cleaning Tools

• Soft-bristled brush or sponge (never abrasive)
• Microfiber cloths or soft towels
• Small vacuum cleaner or hand broom
• Spray bottles for mixing cleaning solutions
• Bucket for water and cleaning solutions
• Fine-grit sandpaper (150-180 grit) for stubborn stains
• Squeegee for glass doors or windows

Cost: A complete set of basic cleaning tools can be assembled for $20-40.

What NOT to Use

This is crucial: Avoid bleach, ammonia, harsh chemical detergents, abrasive scrubbers or steel wool, pressure washers, varnish, paint, or wood sealants on interior surfaces, and essential oils applied directly to wood (these can stain).

These products either damage the wood, leave harmful residues that vaporize when heated, produce dangerous fumes in high temperatures, or trap moisture that leads to warping and decay. Your sauna's wood needs to breathe, and anything that seals the surface interferes with this natural process and can cause serious problems over time.

How to Clean Each Part of Your Sauna

Daily Maintenance: After Each Session (5-10 minutes)

This simple routine prevents most problems before they start:

Benches and Seating Areas:

• Wipe down with a damp cloth to remove sweat and oils
• Use a clean towel to absorb any remaining moisture
• Ensure all surfaces are dry before closing up

Floor:

• Sweep or vacuum to remove any debris
• If using duckboards, lift them to allow air circulation underneath
• Wipe up any pooled water

Read also: Sauna Floor Ideas: Choosing the Perfect Foundation

Ventilation:

• Leave the door open for 15-20 minutes after use
• Ensure vents remain unobstructed
• Allow complete air circulation to prevent moisture buildup

Cost: No additional cost beyond time
Duration: 5-10 minutes per session
Frequency: After every use

Weekly Deep Cleaning (30-45 minutes)

Once a week, dedicate time to a more thorough cleaning:

Step 1: Preparation

• Ensure the sauna has completely cooled (wait at least 2-3 hours after last use)
• Turn off and unplug electric heaters
• Remove any accessories, towels, or loose items
• Open windows or vents for good airflow

Step 2: Remove Loose Debris

• Vacuum or sweep all surfaces, including corners and crevices
• Pay special attention to areas around the heater
• Clean out any dust or cobwebs from ceiling corners

Step 3: Clean Wooden Surfaces

• Mix your cleaning solution (warm water with a splash of vinegar works beautifully)
• Dampen your cloth or sponge, but never soak it
• Wipe all wooden surfaces following the grain of the wood
• Work in sections: start with walls, then benches, then backrests
• For stubborn stains, apply baking soda paste and gently scrub in circular motions
• Rinse with a clean, damp cloth
• Dry thoroughly with a clean towel

Step 4: Address Stains

• For sweat stains: Use diluted vinegar or lemon juice
• For tougher discoloration: Gently sand with 150-180 grit sandpaper
• Always sand with the grain, never against it
• Wipe away sanding dust with a slightly damp cloth
• Allow to dry completely

Step 5: Clean Glass and Doors

• Use natural glass cleaner or vinegar solution
• Wipe with microfiber cloth to prevent streaks
• Don't forget door handles and hinges

Cost: Minimal (uses supplies from your regular stock)
Duration: 30-45 minutes
Frequency: Weekly with regular use, bi-weekly with occasional use

Monthly Maintenance (1-2 hours)

Monthly care addresses deeper issues and maintains long-term performance:

Sauna Stones (if applicable):

• Remove stones from heater (ensure it's completely cool)
• Rinse each stone under warm water
• Check for cracks or deterioration
• Replace damaged stones
• Rearrange stones to ensure proper airflow
• Cost: Replacement stones typically $30-60 per set
• Duration: 20-30 minutes

Heater Cleaning:

For Electric Heaters:

• Disconnect power completely
• Wipe exterior with dry or slightly damp cloth
• Vacuum around heating elements to remove dust
• Never use water on heating elements themselves
• Check all connections and ensure nothing is loose

For Wood-Burning Stoves:

• Remove ash after every use (this is actually a per-session task)
• Clean exterior weekly
• Check chimney and flue for buildup
• Professional chimney sweeping recommended annually

Deep Wood Treatment:

• Inspect all wood for signs of damage, cracks, or warping
• Apply food-grade paraffin oil to benches if desired (enhances protection)
• This is optional, as many prefer untreated wood
• If treating: Apply thin layer with brush, let absorb, wipe excess after 20-30 minutes
• Wait 24 hours before use, then heat to 50°C to complete treatment

Cost: $15-40 including any wood treatment products
Duration: 1-2 hours
Frequency: Monthly

Quarterly and Annual Maintenance

Every 3-4 Months:

• Light sanding of benches and high-contact areas to refresh surface
• Deep inspection for any developing issues
• Check all electrical connections (if applicable)
• Inspect door seals and weather stripping

Annually:

• Professional inspection of heating system
• Chimney sweeping for wood-burning saunas
• Thorough examination of structure for any repairs needed
• Consider reapplying exterior treatments (for outdoor saunas)

Read also: Outdoor Sauna Installation: Your Complete Assembly Guide

Cleaning Portable Saunas: Special Considerations

Portable and tent-style saunas require slightly different care:

After Each Session:

• Wipe down interior surfaces with damp cloth
• Pay special attention to floor mat area
• Leave tent open and unzipped for several hours to air dry
• Use a fan to speed drying if needed

Regular Maintenance:

• Machine wash removable floor mats every few uses
• Wipe interior with vinegar solution (1:3 ratio) 2-3 times per week
• Ensure all seams and zippers are completely dry before storage
• Never store while damp, as this invites mold

Deep Cleaning Portable Saunas:

• Mix plant-based cleaner or vinegar solution in spray bottle
• Lightly mist all interior surfaces
• Wipe with microfiber cloth
• For steam generators: Descale monthly using citric acid or vinegar solution
• Rinse generator thoroughly after cleaning
• Always use distilled water to minimize mineral buildup

Storage:

• Only store when completely dry
• Fold carefully according to manufacturer instructions
• Store in cool, dry location away from direct sunlight
• Keep in breathable storage bag if provided

How to Clean Cedar Sauna Wood Specifically

Cedar is beloved for its aromatic properties, but it requires specific care:

Daily Care:

• Cedar's natural oils resist rot, but it still needs regular wiping
• Use just warm water after each session
• Always sit on towels to minimize direct wood contact

Weekly Cleaning:

• Mild soap solution is safe for cedar
• Avoid over-wetting, as cedar can absorb moisture
• Dry thoroughly to prevent any water staining

Restoring Cedar:

• Light sanding annually releases fresh cedar oils and aroma
• Use 120-150 grit sandpaper
• Sand with the grain in long, smooth strokes
• This removes surface stains and refreshes the natural scent
• Some fading to gray is normal over time and doesn't affect performance

What NOT to Do with Cedar:

• Never apply varnish or sealants, as these trap moisture
• Avoid harsh chemicals that strip natural oils
• Don't use pressure washers
• Resist the urge to paint or stain interior cedar

Preventing Common Sauna Problems

Prevention is always easier than correction:

To Prevent Mold and Mildew:

• Always ventilate thoroughly after use
• Keep door and vents open until completely dry
• Never leave damp towels inside
• Check for water leaks or drainage issues
• Use absorbent towels during sessions

To Prevent Stains:

• Always use towels on benches and floor
• Encourage users to shower before sauna sessions
• Address spills immediately
• Regular cleaning prevents buildup

To Prevent Odors:

• Good ventilation is essential
• Place small bowl of baking soda inside between uses
• Wipe surfaces with diluted lemon juice occasionally
• Never let moisture linger
• Ensure proper drainage

To Prevent Wood Damage:

• Maintain consistent temperature and humidity patterns
• Don't pour water on walls or benches, only on stones
• Avoid wearing wet swimsuits that drip excessively
• Allow wood to expand and contract naturally
• Regular treatment with paraffin oil (optional) provides extra protection

Natural Deodorizing Methods

Keep your sauna smelling fresh using these gentle approaches:

• Small bowl of baking soda placed in sauna between sessions
• Wiping surfaces with diluted lemon juice (1:4 ratio with water)
• Adding 2-3 drops of eucalyptus or pine essential oil to water bucket (never directly on wood)
• Complete drying after each use (fresh air is the best deodorizer)
• Occasional ventilation even when not in use

The Cost of Sauna Maintenance

Let's be practical about expenses:

Initial Supply Investment: $40-80 for all cleaning tools and supplies

Ongoing Monthly Costs:

• Natural cleaning supplies: $5-10 monthly
• Replacement towels as needed: Variable
• Specialty sauna cleaner (if used): $15-30 every few months

Annual Costs:

• Professional heater inspection: $100-200
• Stone replacement (if needed): $30-60
• Wood treatment products: $20-40
• Chimney sweeping (wood-burning): $100-200

Total Annual Maintenance Budget: Typically $200-500 depending on sauna type and usage frequency

This investment is minimal compared to the cost of major repairs from neglect. A well-maintained sauna can last 20-30 years or more, while a neglected one may need significant restoration within 5-10 years.

Read also: How Much Does It Cost to Run a Sauna in 2025?

Creating Your Personal Cleaning Schedule

Adapt this framework to your usage patterns:

Daily (5-10 minutes):

• Wipe down surfaces
• Allow complete drying
• Basic ventilation

Weekly (30-45 minutes):

• Deep clean all surfaces
• Address any developing stains
• Clean glass and doors
• Vacuum thoroughly

Monthly (1-2 hours):

• Clean and inspect heater
• Check stones
• Deep treatment of wood
• Inspect for any issues

Quarterly:

• Light sanding of benches
• Deep inspection
• Professional assessment if needed

Annually:

• Professional maintenance
• Comprehensive inspection
• Major cleaning projects

The Ritual of Care

Cleaning your sauna isn't just maintenance. It's part of the wellness practice itself. There's something meditative about the process: the rhythmic motion of wiping wood, the satisfaction of watching surfaces return to their natural glow, the quiet connection you build with this space that serves you so faithfully.

When you care for your sauna with attention and respect, you're not simply preserving an investment. You're honoring a tradition, maintaining a sanctuary, and ensuring that every future session begins in a space that feels as welcoming and pure as you deserve.

At Eden Hut, we design our saunas to be beautiful, functional, and enduring. With the cleaning practices outlined here, your sauna will reward you with decades of transformative heat therapy, relaxation, and restoration. The time you invest in maintenance returns to you many times over in the form of consistent, exceptional sauna experiences.

If you have questions about cleaning specific Eden Hut sauna models or need guidance on maintaining any particular features of your wellness sanctuary, we're here to help.

Frequently Asked Questions

How often should I clean my sauna?

After every use, perform basic maintenance: wiping down surfaces and ensuring proper ventilation. Weekly deep cleaning is recommended for regular users (3-4 sessions per week), while occasional users can extend this to every other week. Monthly maintenance addresses deeper issues like heater cleaning and stone inspection. The key is consistency. Small efforts regularly prevent major problems.

What is the best way to clean a sauna?

The best approach combines gentle natural cleaners with proper technique. Use warm water and diluted vinegar (1:3 ratio) for most cleaning tasks. Always wipe with the grain of the wood, never against it. Avoid harsh chemicals, excessive moisture, and abrasive tools. Keep it simple: most sauna cleaning requires nothing more than warm water, a soft cloth, and good ventilation. The goal is to remove sweat and oils without damaging the wood's natural properties.

Can I use regular household cleaners in my sauna?

No, avoid conventional household cleaners, especially those containing bleach, ammonia, or strong detergents. These products damage wood, leave harmful residues that vaporize when heated, and can produce dangerous fumes in high temperatures. Instead, stick with natural alternatives: diluted white vinegar, baking soda, mild natural soap, or specialized sauna cleaning products designed specifically for wood. Your sauna wood needs to breathe—harsh chemicals interfere with this essential process.

How do I remove stubborn stains from sauna benches?

For persistent sweat or water stains, try these methods in order: First, apply a paste of baking soda and water, gently scrubbing in circular motions. If stains remain, use diluted lemon juice or stronger vinegar solution (1:1 ratio). For truly stubborn discoloration, very light sanding with 150-180 grit sandpaper works beautifully. Always sand with the grain, never against it. After sanding, wipe clean with a damp cloth and allow to dry completely. Remember, some natural darkening of wood over time is normal and doesn't affect performance.

Do I need to treat or seal the wood in my sauna?

Generally, no. Interior sauna wood should remain untreated and unsealed. The wood needs to breathe, allowing it to absorb moisture during sessions and release it during drying. Varnishes, paints, and sealants trap moisture, leading to warping, cracking, and potential release of toxic fumes when heated. The exception is food-grade paraffin oil, which can be applied to benches for added protection without sealing the wood. This is optional rather than necessary. Many sauna owners prefer completely natural, untreated wood, and this works perfectly well with regular cleaning.

How do I prevent mold in my sauna?

Prevention relies entirely on ventilation and drying. After every session, leave the door and vents open until the sauna is completely dry. This typically takes several hours. Never leave damp towels inside. Ensure proper exterior ventilation around the sauna room. Regular cleaning removes the organic matter that mold feeds on. If you discover early-stage surface mold, create a strong vinegar solution (1:1 with water), spray generously, let sit for one hour, scrub with stiff brush, wipe clean, dry completely, then run the heater to thoroughly dry the area. Monitor closely for recurrence. Good ventilation is your most powerful tool against mold.

How often do sauna stones need to be replaced?

With regular use, sauna stones typically need replacement every 1-2 years. However, this varies based on usage frequency and how often water is poured on them. Inspect stones during monthly cleaning and look for cracks, crumbling, or significant deterioration. Damaged stones don't heat evenly and can affect your sauna experience. When inspecting, also rearrange stones to ensure proper airflow around heating elements. Quality replacement stones usually cost $30-60 per set and are a worthwhile investment in maintaining optimal performance.

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