How to Clean a Wool Rug (Without Ruining It)

Some dyes can run when they get wet. The WoolSafe Organisation notes that rugs from the Middle East may have been dyed with vegetable dyes that are not colourfast to shampooing.

Its advice applies to any rug: test colour fastness on a hidden area before you clean.

Here is a simple way to do it:

• Pick a hidden spot, such as a corner that sits under a sofa.
• Test the darkest and brightest colours, and any reds.
• Dampen a clean white cloth with the cleaning solution you plan to use.
• Press it onto the rug for a short while, then lift it and check the cloth.
• Do the same on a second colour.

If any colour comes off on the cloth, stop. Do not wet clean the rug at home. A rug with running dyes needs a professional.

Wool rug cleaning starts long before you reach for a bucket. Much of the dirt in a rug is dry grit such as sand and fibres, and the WoolSafe guide to cleaning wool carpets says this kind of dirt is removed mainly by vacuuming.

• Vacuum often. Busy areas need it more than quiet rooms.
• Use suction, not a beater bar, on long pile. WoolSafe advises avoiding brushes and beaters on long pile wool, which is why a shaggy rug does best with a plain suction head.
• Keep the vacuum off the fringe. Fringes catch easily and can tear.
• Vacuum the back now and then. Turn smaller rugs over and give the back a pass too.
• Shake small rugs outside. A light shake gets rid of loose grit.
• Dust larger flat rugs gently. Hang the rug over a rail and pat the back lightly, away from the fringe. Skip this on shaggy rugs: long pile tangles easily, so stick to suction.
• Turn the rug every few months. This spreads the wear from feet and sunlight more evenly.

If you spot bare patches or tiny larvae in the pile, moths may be the cause. Read our guide on whether carpet cleaning can get rid of carpet moths.

The wrong bottle does more harm than the dirt. WoolSafe says cleaning products for wool should have low alkalinity, leave no sticky residue and contain no added bleach or dyes.

Its reasons are worth knowing:

• Strong alkaline products (often high pH) can make dyes bleed, cause brown jute staining on light-coloured pile and, in extreme cases, yellow and weaken wool.
• Sticky residue left in the pile makes the rug get dirty again faster.
• Bleach and other additives can bleach or change the colour.

That is why we would not reach for general household cleaners, stain sprays made for other surfaces or bleach-based products. Online tips such as baking soda or vinegar mixes are popular. WoolSafe's advice is to use products with the WoolSafe Approved mark and to test them first.

Speed matters. WoolSafe says spills should be dealt with as soon as possible, because the older the stain, the harder it is to remove.

• Scoop up solids with a spoon or blunt knife.
• Blot liquids with a clean white cloth or paper towel. Do not rub.
• Put the cleaner on the cloth, not straight onto the rug, and use a little at a time.
• Work from the edge of the stain inwards so it does not spread.
• Rinse with a little clean water on a cloth, without over-wetting.
• Blot dry and smooth the pile back into place.

For a stain-by-stain method, our common carpet stains guide covers the most frequent ones. If a pet has had an accident on the rug, our article on removing pet urine smell from carpets explains why smells can come back.

If you are still unsure how to clean your wool rug, or whether it is safe to clean at home, ask us before you start. We are open 24 hours, 7 days a week.

Talk it through with us before you risk it.