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How do I care for Koh Grout Brush?Updated 15 days ago

TL;DR: Rinse Grout Brush bristles in warm water after each use, squeeze gently, and air-dry bristles-up. Store in a dry place away from direct sun and high heat. Don't soak.


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Koh Grout Brush bristle detail
Koh Grout Brush in use

How do I clean Grout Brush after each use?

Run warm water through the bristle bed to flush out dirt and cleaner residue, press the bristles gently to squeeze out water, then stand Grout Brush on its back edge or hang it by Grout Brush Pole so air circulates around the bristles. Skip the tumble dryer and never soak.

1

Rinse warm. Run warm water through the bristle bed to flush out dirt and cleaner residue.

2

Squeeze gently. Press the bristles to push water out. Don't twist or wring.

3

Air-dry bristles-up. Stand the brush on its back edge or hang it by Grout Brush Pole so air circulates.

Can I soak Grout Brush?

No. Leaving Grout Brush submerged in water or cleaner solution softens and warps the polybutylene terephthalate (PBT) bristles, which shortens their useful life and ruins the angled cut that gets into grout channels. A quick rinse and air-dry after each use is all the cleaning the brush needs.

⚠ Don't soak

PBT bristles soften, warp, and splay if left submerged. That ruins the precise bristle angle that bites into grout channels. Rinse only, don't soak.

Warps bristles Ruins the angle

✓ Rinse and dry

A 10-second warm rinse through the bristle bed, a gentle squeeze, and a bristles-up air-dry. That's the entire care routine.

Quick rinse Air-dry bristles-up

How should I store Grout Brush?

Store Grout Brush in a dry place once air-dried. Keep it out of direct sunlight and away from high-heat spots like windowsills, above radiators, or inside hot cupboards next to ovens. UV and heat break down PBT bristles over time, so a shaded cupboard, utility drawer, or cleaning caddy is best.

✓ Best storage spots

Shaded cupboard, utility drawer, cleaning caddy, or laundry shelf. Anywhere dry and out of direct sunlight keeps bristles straight and strong.

Dry Shaded Ventilated

⚠ Avoid

Direct sunlight, hot windowsills, above radiators, next to ovens, in the car boot, or sealed inside a damp plastic bag. UV and heat degrade the bristles over time.

No direct sun No high heat No sealed bags
Koh Grout Brush

Grout Brush

Grab a fresh one when bristles splay or flatten beyond reshaping.

Koh Grout Brush Pole

Grout Brush Pole

Hang Grout Brush off it to air-dry. Doubles as a standing-scrub handle for floor grout.

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Last reviewed: May 2026 · Koh Australia

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