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What surfaces should I avoid using Bathroom & Shower Cleaner on?Updated 7 hours ago

TL;DR: Bathroom & Shower Cleaner is designed for bathrooms. Safe on sealed tiles, grout, glass, chrome, taps, basins, bathtubs, acrylic and fibreglass shower trays, and most bathroom fixtures. It is not food-grade, so use Kitchen Grease & Oil Cleaner or Universal Cleaner for kitchen benchtops and food prep surfaces. Spot test natural stone. Avoid unfinished timber.

Last reviewed: April 2026

Koh Bathroom and Shower Cleaner features
Koh Bathroom and Shower Cleaner before and after

What surfaces can I use Bathroom & Shower Cleaner on?

Bathroom & Shower Cleaner is formulated for sealed bathroom surfaces. Safe on shower screens (glass and acrylic), glazed ceramic tiles, grout, bathtubs, basins, taps, shower trays, fibreglass, stainless steel, and chrome. Spray, allow contact time, wipe or rinse with water. Always spot test on an inconspicuous area first if you're unsure, and skip it on natural stone or unfinished surfaces without checking the manufacturer's guidance.

✓ Safe on most sealed bathroom surfaces

Shower screens, glazed tiles, grout, bathtubs, basins, taps, shower trays, fibreglass, acrylic, stainless steel, chrome, painted surfaces. Spot test first if in doubt.

Showers Baths Basins Taps Chrome & stainless Glazed tiles Glass screens Acrylic screens

What surfaces should I avoid?

Avoid Bathroom & Shower Cleaner on food prep surfaces (it is not food-grade), unfinished or untreated timber, natural stone without a spot test (marble, travertine, limestone can react to cleaners), aftermarket glass coatings or tint films, and any surface where the manufacturer specifies not to use water-based foam cleaners. For kitchen benchtops, cutting boards, and food prep areas, use a cleaner designed for that purpose.

⚠ Use something else for these

Food prep surfaces (not food-grade). Unfinished or untreated timber. Natural stone without spot testing first. Aftermarket glass coatings or tint films. Any surface flagged by the manufacturer as incompatible with water-based foam cleaners.

Not food grade No unfinished timber Spot test natural stone Skip coated glass

What should I use for kitchen surfaces instead?

For kitchen benchtops, splashbacks, stovetops, rangehoods, and food prep surfaces, use Universal Cleaner or Kitchen Grease & Oil Cleaner. Universal Cleaner is a safe spray-and-wipe for everyday kitchen cleaning with a damp rinse. Kitchen Grease & Oil Cleaner is formulated for heavy baked-on grease around rangehoods, ovens, and stovetops. Both are designed with kitchen surfaces and food prep areas in mind.

✓ Universal Cleaner

Everyday kitchen spray-and-wipe. Benchtops, splashbacks, stainless sinks, stovetops. Damp rinse after on food prep surfaces.

✓ Kitchen Grease & Oil Cleaner

Formulated for heavy baked-on grease. Rangehoods, ovens, stovetops, and grease-heavy splashbacks. Rinse after use.


How do I spot test a surface?

Choose a hidden area of the surface (behind a cistern, under a shelf, inside a cabinet). Spray a small amount of Bathroom & Shower Cleaner, wipe with a clean cloth, and wait a few minutes. Check for colour change, dullness, etching, or softening before treating the visible surface. If anything looks off, don't proceed. This is especially important for natural stone, older glass coatings, and any surface you're not sure about.

✓ Three-step spot test

Pick a hidden area. Spray, wipe, wait a few minutes. Check for colour change, dullness, etching, or softening. No reaction means you're clear to proceed.

Hidden area Spray & wipe Wait & check

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