How To · Fashion · Care
Hand-Wash Wool and Cashmere Without Ruining Them
Dry cleaning is expensive and unnecessary for most knits. A gentle hand-wash routine keeps wool and cashmere soft, extends their life, and costs almost nothing.
5 min read · IrisWool and cashmere are tougher than they look. The real enemy isn't water—it's heat, agitation, and harsh detergent. Hand-washing at home is genuinely simpler than driving to the dry cleaner, and your sweaters will thank you with years of softness and shape retention.
This method works for merino, lambswool, cashmere blends, and pure cashmere. You'll need a sink, cool water, and a gentle soap. No special equipment required.
Agitation is the enemy. Let the soap and water do the work while your sweater sits still.
What you'll need.
- 01Sink or large basin
- 02Cool water
- 03Wool-specific soap (Eucalan, Soak, or equivalent)
- 04Clean dry towels (2–3)
- 05Sweater-drying rack or flat surface
- 06Cedar block or lavender sachet (optional, for storage)
Step one · 1 minute
Fill the sink and test the water temperature
Use cool to lukewarm water—never hot. Hot water opens the fiber scales and causes shrinking. Fill your sink or a large basin about three-quarters full. Test the temperature on your inner wrist; it should feel cool or barely warm. Add enough gentle wool-specific soap (like Eucalan or Soak) to create a light lather, following the bottle's ratio. Stir gently to distribute.
Wool soap is pH-neutral and designed not to strip natural oils. Regular laundry detergent is too harsh and will leave residue.
Step two · 2 minutes
Submerge and soak without agitation
Fold your sweater loosely and place it in the soapy water. Gently press it down until fully submerged. Let it sit for 5–10 minutes. Do not scrub, wring, or agitate. The soap will penetrate the fibers and loosen dirt and oils on its own. This passive soak is the entire cleaning mechanism—agitation is what causes pilling and felting.
If the sweater floats, use a clean plate or bowl to gently hold it under the surface.
Step three · 2 minutes
Drain and rinse with fresh cool water
Lift the sweater out gently and let the soapy water drain. Refill the sink with fresh cool water and submerge again. Gently squeeze the rinse water through the fabric—think of it like a gentle massage, not a wringing motion. Drain and repeat this rinse 2–3 times until the water runs clear and you see no soap residue. This step is crucial; leftover soap will make the sweater stiff.
Each rinse should take about 30 seconds. If the water is still cloudy after three rinses, do one more.
Step four · 1 minute
Remove excess water by pressing, never wringing
Lay the sweater flat on a clean towel. Gently press down with your hands to squeeze out water—imagine you're pressing a sponge, not wringing a dishcloth. Fold the towel around the sweater and press again. You can also roll it burrito-style in the towel to absorb more water. The goal is to remove as much water as possible without stretching or twisting the fibers.
Never hold the sweater up and wring it out. The weight of the water will stretch wet wool and cashmere permanently.
Step five · 3 minutes
Lay flat to dry on a clean, dry surface
Place the sweater on a clean, dry towel or sweater-drying rack (flat, not hanging). Gently reshape it to its original dimensions—smooth out the sleeves, adjust the neckline, and straighten the hem. Leave it to air-dry completely, which typically takes 12–24 hours depending on humidity and thickness. Avoid direct sunlight and heat sources like radiators or vents.
Flip the sweater halfway through drying to ensure even moisture evaporation. If it's still damp after 12 hours, move it to a different location with better air circulation.
Step six · 0 minutes
Store properly to prevent pilling and moths
Once completely dry, fold the sweater and store it in a breathable cotton bag or drawer. Do not hang wool or cashmere—gravity will stretch the shoulders over time. Keep it away from direct light and in a cool, dry place. Consider adding a cedar block or lavender sachet to deter moths, but avoid mothballs, which leave a chemical smell that's hard to remove.
Folding is always better than hanging for knits. If you must hang, use a wide padded hanger and only for very short periods.
How to know it works
A successfully hand-washed sweater should feel soft and smell fresh, with no visible soap residue or stiffness. The color should be unchanged, the shape should match the original, and there should be no new pilling or stretching.
Questions at the mirror.
My sweater still smells like soap after drying. What went wrong?
You didn't rinse thoroughly enough. Soap residue will make the sweater stiff and uncomfortable. Next time, do 4–5 rinses instead of 3, and make sure the water runs completely clear before the final rinse.
Can I use regular laundry detergent instead of wool soap?
You can, but it's not ideal. Regular detergent is alkaline and can strip the natural oils from wool and cashmere, leaving them dry and prone to pilling. Wool-specific soap is pH-neutral and costs about the same, so it's worth the small investment.
How often should I actually wash my wool and cashmere sweaters?
Every 3–4 wears if you wear them close to your skin, or every 5–7 wears if you layer over a shirt. Spot-clean stains immediately instead of washing the whole sweater. Many people wash far too often, which accelerates wear.
My sweater pilled after washing. Did I do something wrong?
Pilling is usually caused by friction and agitation during wear, not washing. However, if it happened immediately after washing, you may have agitated it too much during the soak or rinse. Be gentler next time. Use a fabric comb or sweater stone to remove existing pills.
Can I use this method for blended fabrics like wool-cotton or cashmere-silk?
Yes. Use the same cool water and gentle soap method. Blends are generally tougher than pure cashmere, so you can be slightly less delicate, but still avoid wringing and hot water.