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Are there any fabrics I shouldn't use with Universal Cleaner?Updated 8 hours ago

TL;DR: No. Universal Cleaner is not recommended for wool, silk, cashmere, or other protein-based natural fibres. Sensitive Laundry Liquid isn't suitable either. Its protease enzymes can damage protein-based fibres over time. 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.

Last reviewed: April 2026

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

Is Universal Cleaner safe for wool carpet or rugs?

No. Universal Cleaner has not been tested on wool, silk, cashmere, mohair, or other protein-based natural fibres. We can't confirm it's safe for these materials. To avoid any risk of colour change, fibre damage, felting, or discolouration on valuable wool or silk, use a cleaning product that's specifically formulated for delicate natural fibres.

⚠ Not recommended on protein-based fibres

Wool, silk, cashmere, and mohair 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

Can I use Sensitive Laundry Liquid on wool carpet instead?

No. Sensitive Laundry Liquid contains protease, an enzyme that breaks down protein-based stains (sweat, blood, food residue). That same enzyme can also slowly break down protein-based fibres like wool and silk, weakening the fibres over time. It's safe for synthetic-fibre carpets and rugs (nylon, polyester, polypropylene) but not for wool or any natural protein fibre.

⚠ Protease enzymes and protein fibres

Protease breaks down the protein chains in wool and silk the same way it breaks down protein stains. One wash might not cause visible damage, but repeat use weakens fibres and shortens the life of your carpet or rug. Not suitable for wool carpets, wool rugs, or silk upholstery.

No wool No silk No cashmere

What should I use on wool carpet instead?

Check the care label on your carpet or rug first, and follow the manufacturer's cleaning guidance. A wool-safe specialist cleaner from a carpet cleaning supplier is the safest option for regular maintenance. For deeper cleans, stubborn stains, or valuable rugs, book a professional carpet cleaner who has experience with wool. Rug care is one area where the cost of a pro is always lower than the cost of damaging an expensive rug.

✓ 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 or drink, dab lightly with cool water on a clean cloth. Avoid soaking the carpet backing. Leave any deeper treatment to a wool-safe specialist cleaner or a professional.

✓ 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.


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