Common mistakes when washing wool
Common mistakes when washing wool (and how to avoid them)
Washing wool seems simple, but unfortunately, things can sometimes go wrong. A beautiful wool sweater that comes out two sizes smaller... ouch! Fortunately, you can prevent a lot of misery by knowing a few do's and don'ts. In this article, we'll list the common mistakes when washing wool. Do you recognize yourself in any of these mistakes? Don't worry – we'll also give you tips on how to tackle it properly. This way, your wool stays beautiful, soft, and shrink-free.
(For a comprehensive guide, we also refer you to Wool Detergent: Everything You Need to Know – it explains how to wash wool correctly.)
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You want to avoid these mistakes when washing wool
Below, we discuss the most common mistakes. Check them before you start your next wool wash!
Mistake 1: Using regular detergent for wool
This is perhaps the biggest culprit. Regular detergent—whether powder or liquid—often contains enzymes that are fantastic for cotton, but detrimental to wool. They can also contain optical brighteners, bleaching agents, or highly alkaline components. Wool is allergic to these. The result of this mistake? Your sweater can shrink, felt (those infamous matted wool fibers), or lose its softness.
How to prevent it: Always use a wool or delicates detergent that's suitable for wool. If you don't have one, choose one of the alternatives we've described (e.g., baby shampoo) instead of your regular detergent. Remember: enzymes + wool = no. If you accidentally use the wrong detergent, rinse it thoroughly and hope for the best—and learn for next time.
Also read our Top 4 Wool Detergents to choose the right product. The right detergent really makes a difference!
Error 2: Washing too hot
Wool and heat don't mix. A common mistake is thinking, "Oh, 40°C won't hurt." Unfortunately, wool can react even at temperatures above 30°C. The fibers then contract, and your garment shrinks. Wool is especially susceptible to sudden temperature changes—for example, from a warm wash to a cold rinse.
How to prevent: Always wash cold or at a maximum of 30°C. Check the care label; it often says 30°C or a hand-wash symbol. Not sure about your machine? Then wash cold instead. And avoid excessive temperature shock: rinse wool preferably with water that's approximately the same temperature as the wash water.
Error 3: Too high spin speed (too much friction)
Wool doesn't tolerate a rollercoaster ride in the washing machine. If you leave your machine on the standard spin cycle (sometimes 1200 rpm or more), wool gets thoroughly shaken up. This friction and pull on the wet fibers causes felting (lint, balls, and a denser felted surface).
How to prevent: Use the wool cycle on your washing machine. This usually spins at a low speed, e.g., 600 rpm, or even has an adjustable lower setting. No wool cycle? Then choose a delicates cycle and manually set the spin speed lower. Consider using a laundry bag for extra protection, or – if possible – skip the spin cycle altogether and dry flat.
Mistake 4: Wringing or hanging wool garments
After hand washing, a wool sweater is soaking wet and heavy. Wringing it out like a mop stretches the fibers. Hanging it while it's heavy and wet causes it to stretch and the hanger's shoulders to point.
How to prevent: Don't wring! Gently squeeze out water or roll the garment in a towel to absorb moisture. Then dry flat , still in place, out of direct sunlight and away from hot radiators.
Mistake 5: Using the dryer for wool
The dryer combines heat and agitation – two things wool can't tolerate. The result: shrinkage and felting.
How to prevent: Never put wool in the dryer. Even cold air dries with unnecessary friction. Always air-dry wool flat.
Error 6: Washing too often
You don't need to wash wool after every wear. Unnecessary washing wears out the fiber and damages the lanolin.
How to prevent it: Air your sweater first. Wool is naturally antibacterial and odor-resistant. Regularly airing and shaking it out is often enough – which also prevents many of the other mistakes.
Error 7: Washing the wrong combination
Washing wool together with rough textiles or dyes that bleed can cause lint formation and discolouration.
How to prevent: Wash wool separately or with similar delicate items of a similar color. Use a laundry bag and wash new, potentially stain-causing items separately first.
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Frequently asked questions about wool washing mistakes
My wool sweater shrunk – can I save it?
Getting a shrunken (felted) wool garment back to its original size is tricky. You can try soaking the item in a lukewarm bath with baby shampoo or hair conditioner, letting it soak in, and gently stretching it back into shape while still wet. Rinse with lukewarm water and dry flat. Don't expect miracles; sometimes a half-size improvement is possible, but complete recovery is rare. Prevention is better : don't wash at high temperatures and don't spin dry.
Should wool really never be put in the washing machine?
Yes, provided you use a good wool cycle , a suitable wool detergent, and possibly a laundry bag. Modern machines are more sensitive to temperature and agitation. Hand washing is always possible, but don't rub too much. See our guide for Wool Detergent: Complete Guide. for step-by-step instructions.
How do I prevent pilling (small fluff balls) on my wool sweater?
Pilling is caused by friction. Wash inside out, use a laundry bag, and spin on a low spin speed. Choose a mild wool detergent; some products (such as Woolite) add fiber protectors. Don't wear abrasive belts or bags over your sweater. Gently remove any pilling with a laundry comb after drying.
Can I wash different wool garments together?
Yes, usually: multiple sweaters in the same wool cycle are fine, as long as they're colorfast and similar colors (light with light, dark with dark). Keep the drum half full so each item has enough space. If necessary, use a separate laundry bag for each item. Always use the correct detergent.
Also helpful: our guide to wool detergent and emergency tips in Washing Wool Without Detergent . Happy washing!