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How do I use Diamond Sponges?Updated 11 days ago

TL;DR: Diamond Sponges are a powerful abrasive tool, best for ovens and baked-on grease with Universal Cleaner. Dampen the sponge, rub gently in circles, and wipe residue with a Universal Cloth. The coating is abrasive, so always spot test first and avoid glass, polished, chrome, stainless steel, and delicate finishes.


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Koh Diamond Sponges 4pk
Koh Diamond Sponge before and after

How do I use Diamond Sponges?

Spray Universal Cleaner directly onto Diamond Sponge to dampen it, then rub gently in a circular motion on the target area. For baked-on grease, spray Universal Cleaner onto the surface first and let it sit a few minutes before scrubbing. Add more Universal Cleaner as you go, and wipe residue with Universal Cloth. Repeat as required. Always spot test first and avoid vigorous scrubbing on any finish.

1

Dampen the sponge. Spray Universal Cleaner directly onto Diamond Sponge. For baked-on grease, spray the surface too and let it sit a few minutes.

2

Rub gently in circles. Apply to the target area with light pressure to start. The silica alumina coating does the work.

3

Wipe and repeat. Spray more Universal Cleaner onto the surface as you go. Wipe residue with Universal Cloth. Repeat as required.

What are Diamond Sponges best used for?

Diamond Sponges are designed for ovens and baked-on grease used with Universal Cleaner, and for general hard-surface scrubbing where regular cloths and sponges can't shift the build-up. They're a targeted scour-block for trouble spots, not an everyday cloth. On glazed surfaces like ceramic or porcelain tile and sinks, the abrasive coating can dull or scratch the glaze, so these need a spot test in a hidden area and light pressure, and aren't recommended on high-gloss or polished finishes.

Koh Diamond Sponge in use

Best for ovens and grease

Oven racks, oven interiors, and cooktops with baked-on grease, used with Universal Cleaner. This is what it does best.

Oven racks Baked-on grease Cooktops

⚠ Glazed tile and porcelain: spot test

The abrasive coating can dull or scratch glazed ceramic, porcelain tile, and porcelain sinks. Not recommended on high-gloss finishes. If you try it, spot test a hidden area first and use the lightest pressure.

Spot test first Risk of dulling Not on high-gloss

Which surfaces should I avoid with Diamond Sponges?

Do not use Diamond Sponge on glass, polished, or delicate surfaces. The silica alumina coating is abrasive and will scratch glass, chrome, stainless steel, acrylic, plastic, painted surfaces, polished timber, high-gloss finishes, and unsealed stone. Always spot test in a hidden corner before any new surface, use light pressure, and stop immediately if you see any dulling or scratching. Abrasion damage cannot be undone.

⚠ Glass, polished and delicate

Glass, chrome, stainless steel, acrylic, plastic, painted surfaces, polished timber, high-gloss finishes, and unsealed stone will scratch. The coating is harder than these surfaces.

No glass No chrome No polished finishes

⚠ Spot test and go gentle

Always spot test in a hidden corner before any new surface. Use light pressure and stop immediately if you notice any dulling, scratching, or change in finish. Abrasion damage cannot be undone.

Spot test first Light pressure
Koh Diamond Sponges 4pk

Diamond Sponges

4-pack. Built for ovens and baked-on grease. High-density PU foam with a silica alumina coating.

Koh Universal Cleaner

Universal Cleaner

The pairing for Diamond Sponges. Spray it on, scrub, and lift baked-on grease.

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Last reviewed: July 2026 · Koh Australia

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