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How to use: Grout BrushUpdated 17 hours ago

TL;DR: Spray Universal Cleaner directly onto the grout lines. Hold Grout Brush at an angle and scrub larger areas with the long side bristles in a back-and-forth motion. Switch to the short side bristles for corners, edges and tight spaces. For stubborn marks, let the cleaner sit a few minutes before scrubbing. Use light pressure on silicone sealant.


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Koh Grout Brush
Koh Grout Brush cleaning grout lines

How to use: Grout Brush

Spray Koh Universal Cleaner directly onto the grout lines or target area. Hold Grout Brush at an angle and scrub larger areas with the long side bristles in a back-and-forth motion. Switch to the short side bristles for corners, edges and tight spaces. For stubborn marks, let the cleaner sit for a few minutes before scrubbing again, then wipe the residue away with a damp cloth and rinse the area clean. Use light pressure on silicone sealant, which is softer and more delicate than cement-based grout.

Spray and scrub

1

Apply cleaner. Spray Universal Cleaner directly onto the grout lines or target area.

2

Long side, larger areas. Hold the brush at an angle. Use the long side bristles to scrub bigger grout sections in a back-and-forth motion.

3

Short side, tight spots. Switch to the short side bristles for corners, edges and narrow channels.

Finish up

4

Let it dwell on stubborn marks. Give the cleaner a few minutes to lift heavy build-up before scrubbing again.

5

Wipe residue. Run a Universal Cloth or any damp cloth over the area to lift loosened grime.

6

Rinse and dry. Rinse the area with clean water and wipe dry for the best finish.

⚠ Light pressure on silicone sealant

Silicone sealant around shower edges, bath joins and basin perimeters can be soft and delicate. Apply gentle pressure and short strokes here to avoid damaging or dislodging the seal. Stiff bristles can lift soft silicone over time if you bear down too hard.

Gentle pressure Short strokes Shower and bath edges

✓ Reach further with the Pole

For floor grout, shower walls and other hard-to-reach spots, attach Grout Brush to Grout Brush Pole. It saves you bending and lets you scrub at a better angle without losing pressure.

Floor grout Shower walls Better angle

What else can I use Grout Brush on?

Grout Brush is not limited to grout lines. It also works well on fridge door seals, sliding door and shower screen runners, and the seams and creases of leather sofa cushions. For a more detailed clean on runners and seams, wrap a Koh cloth once around the brush head so the bristles push the fabric into the channel.

✓ Beyond grout lines

The narrow head gets into places a cloth alone cannot. Fridge door seals, sliding door and shower screen runners, and the seams and creases on leather sofa cushions are all fair game.

Fridge seals Door runners Sofa seams

✓ The cloth-wrap trick

Wrap a Koh cloth once around the brush head before you run it along a runner or seam. The bristles push the cloth into the channel, so you lift the grime rather than just loosening it.

Wrap once Detailed clean
Koh Grout Brush

Grout Brush

Long-bristle side for larger grout areas, short-bristle side for corners and tight spaces.

Koh Grout Brush Pole

Grout Brush Pole

Clips onto Grout Brush so you can reach floor grout and shower walls without bending.

Browse all Grout Brush articles

Last reviewed: August 2026 · Koh UK

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