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Are there any fabrics I shouldn't use with Universal Cleaner?Updated 13 days ago

TL;DR: Yes. Avoid using Universal Cleaner on wool, silk, cashmere, mohair, alpaca, and other protein-based natural fibres. Sensitive Laundry Liquid isn't suitable for protein fibres either. Use a wool-safe specialist cleaner or consult a professional carpet cleaner. For anything other than light surface dust, always call a pro on valuable wool or silk.


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Koh Universal Cleaner 20+ uses around the home
Koh Universal Cleaner safe for homes and surfaces

Is Universal Cleaner safe for wool, silk, and other natural fibres?

No. Koh Universal Cleaner hasn't been tested on wool, silk, cashmere, mohair, alpaca, or other protein-based natural fibres. Without testing, we can't confirm it's safe for these materials. Protein-based fibres respond differently to cleaning chemistry than synthetic fibres like nylon, polyester, or polypropylene. To avoid the risk of colour change, fibre damage, felting, shrinking, or discolouration on valuable wool or silk carpets, rugs, and upholstery, use a cleaning product specifically formulated for delicate natural fibres. The same applies to wool throws, silk cushions, cashmere blankets, and any garment in those materials.

⚠ Not recommended on protein-based fibres

Wool, silk, cashmere, mohair, and alpaca are all protein-based. They respond differently to cleaning chemistry than synthetic fibres like nylon or polyester. Without product-specific testing, we won't risk your valuable fibres.

Wool Silk Cashmere Mohair Alpaca

What should I use on wool or silk instead?

Check the care label on your carpet, rug, upholstery, or garment first, and follow the manufacturer's cleaning guidance. A wool-safe specialist cleaner from a carpet cleaning supplier (often labelled "WoolSafe approved") is the safest option for regular maintenance and home spot treatment. For deeper cleans, stubborn stains, or valuable rugs, book a professional carpet cleaner who has experience with wool and silk. Rug care is one area where the cost of a professional clean is consistently lower than the cost of damaging an expensive rug. For wool throws and silk cushions, hand-wash with a wool-safe detergent following the care label, or take to a dry cleaner.

✓ Safer alternatives

Check your carpet's care label. Use a wool-safe specialist cleaner (usually labelled "WoolSafe approved"). For deep cleans or stubborn stains, book a professional carpet cleaner with wool experience. Manufacturer guidance always comes first.

Check the care label WoolSafe approved Professional cleaners

What do I do about a fresh spill on wool while I find the right product?

Act fast, blot (don't rub), and use plain water only. Blotting with a clean dry microfibre cloth lifts most fresh liquid before it sets. Work from the outer edge of the spill inward to avoid spreading the stain. If the spill is food, drink, or anything water-soluble, dab lightly with cool water on a clean cloth. Avoid soaking the carpet backing. Press dry with a clean towel and let the area air dry. Leave any deeper treatment to a wool-safe specialist cleaner or a professional. The faster you act on a fresh spill, the less likely you'll need anything stronger than plain water.

✓ Emergency wool care

1

Act quickly and blot, don't rub. Rubbing spreads the stain and can felt the wool fibres. Blot with a clean dry cloth.

2

Work from the outside in. Stops the stain spreading outward into clean fibres.

3

Plain water only for first aid. Cool water on a clean cloth, dabbed lightly. Don't saturate the carpet backing.

4

Dry thoroughly. Press dry with a clean towel, then let the area air dry. For deeper stains, call in a professional.

Koh Universal Cleaner Starter Kit

Universal Cleaner Starter Kit

Pairs Universal Cleaner with Atomiser Spray Bottle and a Universal Cloth. Safe for hard surfaces and synthetic-fibre textiles, not for wool or silk.

Koh Universal Cleaner 2L

Universal Cleaner

Safe for most hard surfaces and synthetic-fibre textiles. Not recommended for wool, silk, or other protein-based natural fibres.

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Last reviewed: April 2026

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