· By Sweet Vibes
How to Clean a Sauna: Benches, Walls, and Floors
To clean a sauna, start with its manufacturer's instructions, work with the equipment off and cool, remove loose debris, clean each surface with an approved method, and dry the room as directed. Wooden benches, glass, flooring, infrared heater coverings, and controls do not all want the same treatment. Your sauna is a warm wooden retreat, not a patio waiting for a pressure washer.
This guide covers routine home-sauna cleaning. It is not a disinfection protocol for a commercial facility or a repair guide. Shared facilities need their own operating procedures and applicable hygiene requirements.
Before you pick up a brush
Find the room, heater, and control manuals. Identify the bench wood or finish, floor material, and any infrared panels or fabric coverings. Check which cleaners are allowed, how they must be diluted, and whether surfaces need rinsing or a particular drying process.
Let surfaces cool before handling them. Follow the manufacturer's power-off or isolation instructions; do not open electrical housings or remove protective covers to clean behind them. If you cannot identify a surface or its approved cleaner, ask the supplier before experimenting.
For help identifying your setup, see our infrared vs. traditional sauna guide. The actual model's manual takes priority over a general article.
How to clean sauna benches
Harvia's bench-care guidance describes warm water, a suitable cleaning solution, and a soft brush used along the wood grain, followed by its rinsing and drying steps. That is guidance for the surfaces covered by its instructions—not permission to soak every sauna.
For your own bench, remove loose debris first, then follow the approved cleaner's application and removal directions. Work methodically across the areas people sit and lean on. Do not increase cleaner strength or scrubbing force because a mark is stubborn. Ask the manufacturer about a remaining stain before sanding or applying a coating.
KLAFS recommends damp-cloth bench cleaning and its specified sauna wood cleaner, with a sponge and clean water to remove dirty residue. It explicitly rules out hosing or pressure washing its standard cabin surfaces. This is a good example of why “more water” is not a universal cleaning upgrade.
A surface-by-surface cleaning plan
Use this table as a planning checklist, then fill in the approved method from your manuals.
| Surface | What to check | What to avoid assuming |
|---|---|---|
| Benches and backrests | Wood type, finish, approved cleaner, tool, and residue-removal method | That every stain needs sanding or every bench needs oil |
| Walls and ceiling | Permitted moisture and access method | That the bench-washing procedure applies everywhere |
| Floor and removable mat | Floor material, cleaning product, and drying requirements; lift only parts designed to be removed | That the room is built to be flooded or hosed out |
| Glass | Approved glass cleaner and how to keep it off adjacent wood and fittings | That a wood cleaner is also suitable for glazing |
| Infrared heater fabric or panels | The exact model's instructions and whether any wiping is permitted | That these can be scrubbed like a bench |
| Controls, sensors, and heater | Manufacturer-approved external care and service boundaries | That routine cleaning includes opening equipment or spraying components |
Walls, floors, and glass: keep the method specific
KLAFS calls for damp-mopping its cabin floor and damp-cloth care for wall and ceiling wood. Its guidance also includes exceptions for certain specially designed commercial equipment. Do not borrow an exception from another room and apply it to yours.
For an infrared example, Sunlighten's mPulse Empower support page distinguishes its wood and glass cleaners. It says its heater fabric may be wiped with a slightly damp cloth only when the sauna is off. That instruction does not establish a method for every infrared heater, control panel, or sensor.
Organize cleaning so you are not carrying a dripping cloth over equipment. Keep tools and products outside the room when you are finished, and leave all covers, sensors, vents, and controls in their intended positions.
The after-use checklist
Harvia's after-bathing guidance includes removing bench covers and the water bucket, wiping moisture, and drying and ventilating according to its instructions. Use your own model's directions for heater operation and vent or door positions; do not invent a drying cycle.
- Remove used towels and covers for laundering according to their care labels.
- Take out personal belongings and any permitted accessories that should not remain in the room.
- Wipe visible moisture from approved surfaces with the appropriate cloth.
- Check for debris or residue that needs attention before the next session.
- Complete the manufacturer's drying and ventilation procedure.
- Before leaving, confirm the equipment is in its required final off state and no cleaning supplies remain near it.
This is a task checklist, not a substitute for the sequence in your manual. A short routine you can repeat is more useful than an ambitious one you keep postponing.
How often should you deep-clean a sauna?
There is no single calendar that fits every home and studio. Harvia's general care page describes one to three thorough cleans a year for a family sauna; KLAFS distinguishes heavier commercial use from private use. Those examples do not override your manual, usage level, visible dirt, or facility procedures.
Record the last clean and any unresolved issue. If the room repeatedly remains damp, develops a persistent odor, or has recurring suspicious growth, ask the manufacturer or an appropriate professional to assess the cause rather than trying to hide it with scent.
Common questions
Can I use a pressure washer inside?
Do not treat it as a general cleaning method. KLAFS expressly prohibits it for its cabin surfaces and warns about warranty consequences. Follow your own room's instructions.
Should I oil the wood after cleaning?
Only if your manufacturer permits the specific treatment on that surface. Harvia describes paraffin-oil bench care, while KLAFS cautions against impregnating its interior wood. Do not convert one brand's guidance into a rule for all saunas.
Can I use body lotion to condition the bench?
No. Sauna Sauce products are personal-care products, not cleaners, disinfectants, wood treatments, heater additives, or stone treatments.
A clean room, then your own ritual
Use a clean sitting towel and follow the venue's product rules; our shared-sauna etiquette guide covers the visitor side. If peppermint and eucalyptus suit your routine, explore Sauna Sauce Original Formula for a refreshing sensory body-care experience. Follow the label and keep it on the body—not the wood. Good care keeps the room ready; your ritual makes it yours.
