A wool blanket usually needs less washing than a cotton one. Wool fibres resist some dirt and odour, and frequent washing can do more harm than good if the blanket is agitated, heated, or left wet. Often, a thorough airing and a careful spot-clean are enough.
When a full wash is necessary, first establish whether the blanket can be washed at all. A washable wool blanket can be cleaned gently in a tub, but a dry-clean-only, heavily structured, antique, or fragile blanket is better entrusted to a cleaner familiar with wool textiles. The safest method is the one that uses the least movement, the least heat, and no sudden change from wet to dry.
Before washing: decide whether it needs a bath
Take the blanket outdoors or to an open, shaded room and let it air before reaching for water. Lay it over a clean rail or broad surface where air can move around it. Avoid strong, prolonged sunlight, which can fade some dyes and weaken exposed fibres over time.
After airing, inspect the blanket in good light. Look for:
- loose seams, worn binding, small holes, or areas that are thinning;
- stains that can be treated locally rather than spreading through the whole blanket;
- a persistent musty smell, which may indicate that the blanket has been stored damp;
- signs of moth activity, such as small holes or fine debris.
Brush away loose dust with a soft clothes brush, moving lightly in the direction of the nap if the blanket has one. Do not beat or vigorously shake an old blanket. If it is only dusty or slightly stale, airing may be all it needs.
For a fresh spill, blot rather than rub. Use a clean, absorbent cloth and work from the outside of the mark towards the centre. Rubbing tangles the fibres and can turn a small mark into a felted, raised patch. Test any spot-cleaning solution first on an inconspicuous area, especially when the blanket is dyed or patterned.
Check the label and the condition of the blanket
Read the care label before washing. If it says dry clean only, follow that instruction. A blanket without a label deserves extra caution, particularly if it is old, handwoven, richly coloured, lined, fringed, or already misshapen.
Do not assume that a blanket described as wool is suitable for a home wash. The wool itself may be washable while a backing, trim, dye, or construction method is not. If in doubt, clean only a small spot and seek professional advice before wetting the whole piece.
For a labelled washable blanket, check for colour bleeding by pressing a damp white cloth against a hidden corner. If colour transfers readily, avoid soaking it at home. Also inspect and repair, where practical, any open seam or small tear before washing. Water makes a blanket heavy, and existing damage can spread when it is lifted.
How to wash a wool blanket by hand
Hand-washing is suitable only when the care instructions permit it and you have enough space to support the wet blanket. A bathtub, large clean basin, or deep utility sink is useful. The tub must be clean and free of leftover cleaning products.
1. Prepare cool or lukewarm water
Fill the tub with cool or lukewarm water. Avoid hot water, and do not alternate between hot and cold water. Sudden temperature changes, combined with movement, encourage wool fibres to contract and interlock.
Add a small amount of detergent made for wool or other delicate animal fibres. Use the quantity recommended on its label; extra detergent is not extra cleanliness, and it can be difficult to rinse from a dense blanket. Avoid ordinary biological detergents, bleach, fabric softener, and harsh stain removers unless a textile professional has advised their use.
2. Submerge without scrubbing
Lower the blanket into the water and press it down gently so that it becomes saturated. Do not push it around the tub, twist it, rub it, or lift one end repeatedly. Let it soak for the period given by the detergent instructions, keeping the movement to a minimum.
If the water becomes dirty, that is not a reason to scrub. A wool blanket releases soil through soaking and gentle pressing. Work patiently, using the flat of your hands to press water through the fabric only where needed.
3. Rinse in similar-temperature water
Drain the wash water and refill the tub with clean water of a similar temperature. Press the blanket gently to help release detergent, then drain and repeat until the water is clear and the blanket no longer feels soapy.
Do not hold the wet blanket by a corner or edge. Saturated wool is much heavier than dry wool, and unsupported lifting can stretch the weave or distort the shape.
4. Remove water with support
Drain the tub as fully as possible while the blanket is still resting on its base. Press down gently to release more water; never wring or twist it.
For a manageable blanket, place it on clean towels and roll the towels and blanket together, pressing lightly on the roll. Unroll and repeat with dry towels if necessary. For a large blanket, a second person can help transfer it while it is supported from underneath. A mesh drying rack or broad, clean, flat drying surface will prevent it from hanging under its own weight.
Dry the blanket flat and in its proper shape
Lay the blanket flat on a drying rack or clean surface, away from direct heat and strong sun. Smooth it into its natural dimensions while it is still damp. Align the edges and corners without pulling them sharply. If it has a nap, fringe, or distinctive border, keep these lying in their usual direction.
Turn the blanket occasionally so that air reaches both sides. Drying time depends on the thickness, room temperature, and air movement. Do not fold it away while the centre still feels cool or damp, and do not put it on a radiator, in a tumble dryer, or close to a stove. Localised heat can shrink or distort wool even when the rest of the blanket remains damp.
If the blanket develops a musty smell while drying, improve the air circulation and give it more time. Fragrance is not a substitute for dryness. A persistent smell after thorough drying may point to earlier damp storage or deeper soiling and may need professional treatment.
Once completely dry, inspect the blanket again. Check that the seams remain sound, the edges have not stretched, and no damp patches remain. If the fabric feels stiff or slightly changed, avoid trying to correct it with vigorous brushing or steam. Wool can be easily distorted when its structure has already been disturbed.
Storing a wool blanket between seasons
Storage begins with a clean, dry blanket. Moths are attracted to natural fibres and to traces of skin, food, and body oils, so do not store a blanket immediately after a long season of use without at least airing and inspecting it. If it needs washing, allow it to dry fully first.
Fold the blanket along broad, relaxed folds rather than compressing it into a small package. Very sharp folds can place continued stress on old fibres. If practical, change the fold direction when the blanket is brought out again.
Wrap it in a clean cotton sheet or place it in a breathable cotton storage bag. Cotton allows some air movement and keeps dust from settling directly on the wool. Avoid sealing a blanket in plastic for long-term storage, especially if there is any possibility that residual moisture remains inside.
Choose a cool, dry cupboard or chest away from damp walls, strong sunlight, and heat sources. Do not store it directly on a cellar or attic floor. Keep the blanket separate from anything wet, freshly treated with chemicals, or likely to transfer colour. Cedar or lavender may make a cupboard pleasant, but they should not be treated as a replacement for inspection and dry conditions.
Every so often, open the storage place and check the blanket. Look for moth damage, dampness, or a stale smell before the problem spreads. Air it in shade on a dry day, then return it only when it is completely dry.
Common mistakes to avoid
- Washing by habit: Air and spot-clean first. A full wash is not automatically the gentlest choice.
- Using hot water: Keep the wash and rinse water at a similar cool or lukewarm temperature.
- Scrubbing stains: Blot and treat locally rather than rubbing the fibres together.
- Wringing the blanket: Press water out gently and support the weight from underneath.
- Drying over a line: A heavy, wet blanket can stretch out of shape when suspended.
- Applying direct heat: Radiators, tumble dryers, and hot air can shrink or distort wool.
- Storing before it is dry: Even a small amount of trapped moisture can lead to a musty smell.
- Ignoring damage: Loose seams and holes are easier to mend before washing than after a wet blanket has been lifted.
The practical rule is simple: wash only when needed, and make every stage quiet. Cool water, a wool-safe detergent, little agitation, careful support, and complete drying will protect the blanket far better than forceful cleaning. For an uncertain or valuable piece, leaving it unwashed and seeking advice is often the most careful form of care.