Sauna Care & Cleaning Guide

In brief

Good sauna care starts with a short routine you can repeat: protect the benches, remove moisture and used towels, clean with products approved for the materials, and inspect the heater stones at the intervals in your manual. Separate the jobs you do after each session from occasional cleaning and servicing. That makes it easier to notice a change before it becomes part of the background.

Start with the manuals for your sauna and heater

Save the room, heater and control manuals together. Photograph the model labels and keep installer details in the same folder. A wood treatment, cleaner or service interval appropriate for one product may differ from the instructions for another. Tylö, for example, provides separate documents for individual rooms, heaters and controls. Find Tylö’s owner resources here.

Make a short care card from those documents: approved cleaner, approved wood treatment if any, drying procedure, stone inspection interval and service contact. Record the instructions that actually apply to your equipment. Keep the full manuals available when a job requires more detail.

After each session: towels, moisture and drying

Use a clean towel on the bench. After bathing, remove used towels and the water bucket, wipe away droplets and follow the room’s drying procedure. Harvia’s maintenance guidance recommends a damp cloth for routine cleaning and emphasizes sufficient ventilation during drying. The right vent and heater settings depend on the installed system. Read Harvia’s sauna care guidance.

Give towels a designated place outside the sauna so they do not accumulate on the benches. Keep a suitable cleaning cloth with your other supplies. If several people use the room, agree who completes the closing routine. A clear handoff is especially helpful when the last person leaves at a different time.

Clean the wood with the right method

For periodic bench cleaning, Harvia recommends warm water, a suitable cleaning solution and a soft brush. Wood treatment is a separate step: the correct product and application depend on the timber and existing finish. Check the room manufacturer’s instructions before oiling or treating any surface. Do not assume a treatment for benches also belongs on every wall and ceiling. See Harvia’s maintenance tips.

Allow enough time to finish drying after cleaning. Choose a day when the room will not immediately be needed, move loose accessories out of the way and follow the cleaner’s label. Keep product packaging or a photo of its instructions in the care folder, so the next cleaning does not depend on memory.

Include the sauna stones in your maintenance plan

Stones gradually break down during use. Crumbling pieces can collect in the heater and restrict airflow. Harvia recommends checking stones at least annually, with more frequent attention when use or visible debris calls for it. Let the heater cool and follow its shutdown and maintenance instructions before any inspection. Replace damaged stones with the specified type, then restack according to the manual. Harvia explains how to inspect sauna stones.

Write down the inspection date and what was changed. If you arrange professional service, ask the technician to identify which jobs belong in your regular routine. Keep the replacement stone specification with the heater model rather than relying on a photograph alone.

Treat the exterior as a separate set of materials

An outdoor sauna has surfaces exposed to weather as well as an interior exposed to heat. Ask for the care instructions for its cladding, roof, door and hardware. Tylö’s general FAQ, for example, includes exterior sealing for its outdoor models; this should not be treated as a universal schedule or product recommendation for every sauna. See Tylö’s maintenance guidance.

Keep dated photos of the exterior and note any changes you want the installer to assess. Review the care folder when the seasons change or when your pattern of use changes. The aim is a routine matched to your actual sauna, with clear instructions for ordinary cleaning and a named contact for service.

Frequently asked questions

How often should I clean my home sauna?

Remove used towels and wipe moisture after sessions. Schedule deeper cleaning according to use, visible dirt and the room manufacturer’s instructions. Harvia suggests one to three basic cleanings a year for a family sauna, but your sauna may need a different routine. Harvia’s care guidance.

Should I oil the wood inside my sauna?

Only use a treatment approved for the specific surface and existing finish. Benches, walls and ceilings may have different requirements; check your sauna manufacturer’s instructions before applying anything.

When should sauna stones be checked?

Follow the heater manual. Harvia recommends at least an annual check and more frequent inspection if stone fragments appear beneath the heater or the sauna sees heavy use.

If you are still selecting a room, our home sauna planning guide helps you think through access and servicing before installation. For questions about an existing Nørdhus sauna, contact our team with the model and the issue you have noticed.