How To · Fashion · Wear
Hand-wash your knits without the guilt
Hand-washing knits isn't precious or complicated—it's actually cheaper and gentler than dry cleaning. Here's the method that keeps your favorite sweaters soft for years.
5 min read · IrisKnits are not your enemy. The myth that cashmere and merino require professional cleaning has survived because dry cleaners benefit from it. The truth: your bathroom sink is a perfectly adequate laundry facility for wool, cashmere, cotton blends, and most delicate fibers. All you need is lukewarm water, a gentle soap, and patience.
This method works for everything from vintage thrifted sweaters to contemporary basics. It takes ten minutes of actual work spread across a few hours of soaking and drying. Your sweaters will feel softer, last longer, and cost you almost nothing.
Knits are not your enemy. The myth that cashmere and merino require professional cleaning has survived because dry cleaners benefit from it.
What you'll need.
- 01Basin, sink, or bathtub
- 02Wool-specific detergent or baby shampoo
- 03Measuring spoon
- 04Clean dry towels (at least 2)
- 05Flat drying surface (towel, rack, or bed)
- 06Sweater stone or lint roller (optional)
Step one · 1 minute
Fill your basin and test the water
Use a sink, bathtub, or large bowl. Fill with lukewarm water—aim for the temperature you'd use to wash your hands. Cold water is fine too, but lukewarm helps detergent work faster. Test the water temperature on your inner wrist; it should feel neutral, not hot. Hot water is the enemy of knits: it causes fibers to relax and lose shape permanently.
If you're washing multiple sweaters, use a larger vessel or wash them one at a time.
Step two · 1 minute
Add soap and submerge the sweater
Use a wool-specific detergent (Woolite Delicates, The Laundress Delicate Wash, or Dreft work well) or a gentle baby shampoo. Add one teaspoon to two tablespoons depending on water volume and sweater size. Stir to dissolve. Fold your sweater loosely and submerge it completely. Let it sit for 10–15 minutes. The soap does the cleaning; agitation does the damage.
Avoid regular laundry detergent, which contains enzymes that break down protein fibers. Wool-specific formulas are pH-balanced for knits.
Step three · 2 minutes
Gently agitate and rinse
After soaking, gently squeeze the soapy water through the sweater—don't twist or wring. Work slowly from the top down. Drain the basin and refill with clean lukewarm water. Submerge and gently squeeze again. Repeat the rinse two to three times until the water runs clear and you feel no soap residue. This step matters: leftover detergent will stiffen the fibers.
If the sweater feels slippery or soapy after the final rinse, do one more pass with plain water.
Step four · 1 minute
Remove excess water without wringing
Lay the sweater flat on a clean, dry towel. Gently press down to absorb water—don't squeeze or twist. Roll the sweater loosely in the towel to remove more moisture. Unroll and transfer to a fresh dry towel. The goal is to remove as much water as possible before laying flat to dry.
Use white or colorfast towels to avoid dye transfer. Microfiber towels work especially well.
Step five · 5 minutes
Lay flat to dry completely
Lay the sweater flat on a clean, dry surface—a towel, drying rack, or clean bed works. Gently reshape it to its original dimensions. Smooth out wrinkles with your hands. Leave it to air dry completely, which typically takes 24 hours. Do not hang wet knits; the weight of water will stretch them permanently.
Ensure good air circulation by opening a window or placing a fan nearby. Avoid direct sunlight, which can fade colors.
Step six · Ongoing
Fold and store properly
Once completely dry, fold your sweater and store it flat or loosely rolled in a drawer or shelf. Never hang knits on hangers; the weight stretches them out of shape over time. If you notice pilling, use a sweater stone or lint roller to gently remove pills. Repeat this wash every 3–4 wears, or when the sweater actually needs cleaning—not on a schedule.
Merino and cotton blends are more durable than cashmere and can handle slightly more frequent washing. Cashmere should be washed less often to preserve its softness.
How to know it works.
A successfully washed knit should feel soft, smell clean, and maintain its original shape and dimensions. The fibers should have no residual soap, and the sweater should dry completely within 24 hours.
Questions at the mirror.
Can I machine-wash knits on delicate?
Technically, yes—many modern machines have a delicate cycle designed for knits. However, hand-washing gives you complete control and takes the same amount of time. If you choose the machine, use a mesh bag, cold water, and the gentlest cycle available.
What if my sweater has stains?
Treat stains before washing. For oil or grease, apply a tiny amount of dish soap directly to the spot and gently rub. For wine or food, blot with cool water first, then treat with a stain remover designed for delicates. Let it sit for 10 minutes before washing normally.
How often should I actually wash knits?
Knits need washing far less often than you think. Wash when visibly soiled or after 3–4 wears. Merino and wool naturally resist odor and bacteria. Between washes, air your sweater outside or hang it in a steamy bathroom to refresh.
My sweater stretched during drying. Can I fix it?
Slightly. Wet the sweater again and gently reshape it while damp, then lay flat to dry. For severe stretching, there's no reliable fix—prevention (flat drying only) is key.
What's the difference between wool, cashmere, and merino?
All three are animal fibers and wash the same way. Cashmere is softest but most delicate. Merino is durable and naturally antimicrobial. Wool is sturdy and affordable. The method works for all of them.