How do I use Bathroom & Shower Cleaner?Updated a day ago
Quick version: Spray Bathroom & Shower Cleaner over the surface, spread the foam with the block colour side of the Ultra Pro Bathroom Mitt, and leave it for 2 to 3 minutes for a regular clean. Give stubborn soap scum or limescale up to 10 minutes, scrub any spots that need extra help with the striped side, then rinse well. A weekly clean keeps the build-up manageable, and one box lasts around six months in an average home.
How do I use Bathroom & Shower Cleaner?
✓ The five-step method
Spray the foam on. Straight onto the surface from the Foaming Spray Bottle. Cover the whole area you are cleaning. Two foam lines in a criss-cross works for a light clean, four for heavy build-up.
Spread it with the block colour side. Dampen Ultra Pro Bathroom Mitt and use the flat microfibre side to work the foam out evenly. This is the step people skip, and it is the one that decides whether the formula touches all the grime or half of it.
Leave it to sit. 2 to 3 minutes for a weekly clean. Up to 10 minutes for hardened soap scum or limescale. The foam is doing the work while you do something else.
Scrub only what needs it. Turn the mitt over to the striped scrubby side for grout lines, corners and anything still holding on. Most weekly cleans never get to this step.
Rinse with water. Rinse the surface down, then dry glass with Bathroom Squeegee if you want it streak free.
✓ A little patience does the hard work
Give the foam time to loosen the build-up before you rinse. For everyday cleaning, 2 to 3 minutes is usually enough. Tougher soap scum or limescale may need up to 10 minutes.
Keep the surface wet while the foam works, then rinse it away before it dries. That helps prevent streaks and leaves the surface feeling clean.
How long should I leave the foam on?
Weekly maintenance
2 to 3 minutes
Regular bathroom, cleaned last week. Spray, spread, wait, rinse. No scrub needed.
Moderate soap scum
Around 5 minutes
A few weeks between cleans, visible film on the screen. Light scrub with the striped side after.
Heavy build-up
Up to 10 minutes
Hardened soap scum, limescale, neglected grout. Re-spray if the foam starts drying.
⚠ Two things that waste dwell time
Letting the foam dry out completely. Once it dries it stops working and you are left rinsing dried product off rather than lifting grime. On a warm tile wall in summer that can happen in a couple of minutes, so re-spray rather than pushing on.
Adding more product instead of more time. A second coat does not clean faster than the first coat left alone. Time is the free ingredient.
Which bathroom surfaces can I use it on?
✓ Sealed bathroom surfaces
Glass and acrylic shower screens, glazed ceramic tiles, grout, bathtubs, basins, taps, shower trays, fibreglass, stainless steel, chrome and painted surfaces. The formula sits at pH 8, which is mildly alkaline rather than the strong acid descalers a lot of bathroom products are built on, so it is easier on grout lines, seals and metal finishes over the long run.
⚠ Three to check before you spray
Natural stone. Marble, travertine and limestone are porous and can dull or etch. Test a hidden patch first, and if the stone supplier specifies pH-neutral cleaners only, follow them.
Food prep surfaces. Kitchen benchtops, chopping boards and anywhere food is handled should be cleaned with a product intended for food-contact areas.
Coated glass. If your screen carries an aftermarket coating or tint film, the coating manufacturer sets the cleaning rules and their instructions beat ours.
How often should I use it, and how long does a box last?
✓ Weekly is the sweet spot
A weekly clean keeps soap scum soft enough that the foam lifts it without a scrub. Leave it a month and you are into the 10 minute dwell and the striped side of the mitt.
For shower screens specifically, the cheapest habit in the bathroom is a quick spray and rinse after a shower once or twice a week, or a pass with Bathroom Squeegee while the glass is still wet.
✓ How long a box lasts
Around six months of weekly cleans in an average home. That is roughly four refills of the Foaming Spray Bottle from one box.
Your mileage moves with the size of the household, how many bathrooms you are cleaning and how hard your water is. Hard water areas build limescale faster and use more product per clean.
GECA certified, Sensitive Choice approved, Dermatest tested, Eczema Association recognised. 12 ingredients, pH 8, made in Australia.
Bathroom & Shower Cleaner, Ultra Pro Bathroom Mitt and Foaming Spray Bottle. New to Koh, this is the one to start on.
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Last reviewed: September 2026 · Koh Australia