How do I use Diamond Sponges?Updated 5 hours ago
TL;DR: Diamond Sponges are a powerful abrasive tool. Dampen with Universal Cleaner, rub gently in circles on the target area, and wipe residue with a Universal Cloth. Always spot test first. Avoid plastic, chrome, stainless steel, and some types of glass.
Last reviewed: April 2026
How do I use Koh Diamond Sponges?
Spray Universal Cleaner directly onto Diamond Sponge to dampen it, then rub gently in a circular motion on the target area. Add more Universal Cleaner onto the surface as you go, and wipe residue with Universal Cloth. Repeat as required. Always spot-test first and avoid vigorous scrubbing on any finish.
Spray Universal Cleaner directly onto the sponge to dampen it.
Apply to the target area and gently rub in a circular motion. Keep pressure light to start.
Spray more Universal Cleaner onto the surface as you go. Wipe residue with Universal Cloth. Repeat as required.
What are Koh Diamond Sponges best used for?
Diamond Sponges tackle tough jobs that regular cloths and sponges can't. Best for hard water marks on shower screens, soap scum on bathroom tile, baked-on residue on oven racks and cooktops, and stubborn build-up on ceramic, porcelain, glazed tile, and sealed natural stone. Think of it as a targeted scour-block for trouble spots, not an everyday cloth.
Best for stains
Hard water marks, soap scum, baked-on food residue, grease splatter, rust stains, and grime build-up where regular cloths have given up.
Best for surfaces
Ceramic and porcelain tile, glazed bathroom walls, porcelain sinks, glass shower screens, oven racks, cooktop surfaces, and sealed natural stone. Always spot-test first.
Which surfaces should I avoid with Koh Diamond Sponges?
Skip plastic, chrome, stainless steel, and some types of glass. Diamond Sponges are highly abrasive, so softer finishes will scratch. Always spot-test in a hidden corner before committing to the full clean, and rub gently rather than vigorously. If you see any change in finish, stop and switch to a softer tool.
⚠ Softer finishes
Plastic, chrome, stainless steel, acrylic, and some types of glass will scratch. Painted surfaces, polished timber, and unsealed stone are also off-limits.
⚠ Spot test and go gentle
Always spot-test in a hidden corner first. Use light pressure and stop immediately if you notice any dulling, scratching, or change in finish. Abrasion damage cannot be undone.
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