Updated September 2026
Less than most homeowners expect. You clean the shower enclosure the same way you would clean any regular shower: wipe down the glass, tile, and surfaces so water spots and soap residue do not build up. The steam-specific part is the generator, which needs to be kept free of mineral scale. That can be done manually, or it can be handled continually with MrSteam's AutoFlush® accessory, which runs fresh water through the system before each session and drains the tank about two hours after you finish.
In other words, steam shower maintenance is really three things: keep the shower itself clean, keep the generator from collecting scale, and make sure the generator is installed somewhere a technician can reach it. The first is just your usual shower cleaning routine, the second is a small added step that AutoFlush can automate, and the third is a one-time decision during installation.
Steam shower maintenance comes down to three jobs.
Daily care for a steam shower is the same wipe-down you already do in a regular shower: squeegee or towel the glass, and clean the surfaces with mild soap and water. There is no separate steam cleaning ritual, and the room sees less water than you might expect.
A 20-minute session: MrSteam's standard residential generators use between two-thirds of a gallon and 2 gallons of water in a full 20-minute session. That is a fraction of what an ordinary shower sends down the drain.
Two small habits help clear the steam from the shower and dry out faster. Running cold water for 15 to 30 seconds at the end of a session dissipates the remaining steam, and a bathroom exhaust fan mounted outside the enclosure, or an operable transom window, clears the leftover humidity.
Both take seconds, and neither is unique to steam ownership. Drying the room out is also the practical answer to the mold question, which is a separate worry worth reading on its own. Read Common Myths About Home Steam Showers for a closer look.
The generator needs protection from mineral scale. Nothing more. Every time water boils into steam, the minerals in it stay behind, and in homes with hard water those deposits build up in the tank and on the heating element.
Left alone long enough, scale forces the element to work harder and shortens the equipment's life. The traditional answer was periodic manual draining and flushing, which is exactly the chore homeowners picture when they hear the word maintenance.
AutoFlush removes that chore. It introduces fresh water before each steam session and drains the tank about two hours after use, so mineral-heavy water never sits in the tank between sessions.
MrSteam's clean-steam mechanism is simple: rinse before, drain after, no calendar reminder required.
For most homeowners, that means the generator's one real maintenance need can be handled in the background rather than added to a weekend to-do list.
Service access is a maintenance decision you make exactly once, during installation, and it determines whether every future service visit is simple or miserable.
The generator never goes inside the steam room itself. It lives in a closet, a vanity, a sealed bench, a heated attic, or a basement, anywhere up to 60 feet from the shower, which gives your builder real flexibility in where to put it.
Details like threaded pipe unions and an access panel cost little during construction and save enormously later. This is the one maintenance item nobody warns homeowners about before installation, and it is also the easiest to get right when it is still under construction.
Skipping generator maintenance produces a slow decline rather than a dramatic failure. Scale accumulates, the heating elements work harder to produce the same steam, performance gradually drops, and the generator's working life gets shorter than it should be. Nothing about that is alarming on any given day, which is exactly why it is easy to neglect.
What scale buildup looks like over time
The equipment itself is built for the long haul. MrSteam's standard residential generators, the MS, Super, and MAX models, use a surgical stainless steel tank and carry a limited lifetime warranty.
The compact Steam@Home™ line carries a limited one-year warranty, which is worth knowing if you are comparing entry models.
Either way, scale is the one variable the owner actually controls. With AutoFlush handling the flush and drain cycle automatically, that control does not depend on your memory.
Start with the reframe. Maintenance is not one looming obligation, it is three named jobs: wipe down the enclosure like any shower, keep the generator clear of scale, and leave the generator reachable.
The first is a habit you already have, the third is a single decision made during construction, and the middle one, the job everybody actually fears, is the one an accessory does for you.
Then size a system to your bathroom with MrSteam's VirtualSpa® tool, which does the room volume math for you in three steps. Then talk with a MrSteam dealer about the configuration that fits your space, and ask them to include AutoFlush in the quote. It is the single accessory that most changes what ownership feels like day to day.
Size the steam system for your bathroom first, then talk with a MrSteam dealer about the generator, AutoFlush, and service-access plan that fit the space.
Not with AutoFlush on the system, which is the honest answer. The accessory rinses and drains the tank around every session, so the descaling happens without you scheduling it. Without AutoFlush, the generator needs periodic manual draining and flushing on the schedule in your model's installation, operation, and maintenance manual, and how often depends on how hard your water is.
A steam shower adds exactly one job to regular shower care: keeping the generator free of mineral scale. The enclosure gets the same wipe-down as any shower, and the AutoFlush accessory automates the generator work by rinsing and draining the tank around every session.
AutoFlush is a MrSteam accessory that introduces fresh water into the steam generator before each session and drains the tank about two hours after use. That cycle reduces scale buildup and extends generator life, and it runs automatically, with no input from the owner.
Descaling frequency depends on your water hardness, since harder water deposits minerals faster. With AutoFlush, the tank drains after every session, so mineral-heavy water never sits long enough to build significant scale. Without it, follow the flushing schedule in your model's installation, operation, and maintenance manual.
The generator keeps working, but scale gradually coats the tank and heating elements, efficiency drops, and the unit's working life shortens. The change is gradual enough to miss until performance is noticeably worse.
Outside the steam room, always, in a closet, vanity, sealed bench, heated attic, or basement up to 60 feet from the shower. The location should leave a technician clear access to the unit, which is worth confirming with your contractor before construction closes the walls.