How to wash knitted sweaters without ruining them
By Cynthia Lodite, July 22, 2026A good knitted sweater is more than just a cold-weather essential; it is an investment in comfort and style.
Whether it is made from wool, cashmere, cotton or synthetic fibres, proper care can help your favourite sweater maintain its shape, softness and warmth for years. Unfortunately, many sweaters become stretched, shrunk or covered in lint simply because they are washed incorrectly.
Textile care experts agree that following the garment’s care label is the first step to preserving knitwear. Different fibres require different washing methods, and ignoring these instructions can permanently damage the fabric.
Here are practical tips to help you wash knitted sweaters without ruining them.
1. Always read the care label
Before washing your sweater, check the label inside the garment. It will indicate whether the sweater should be hand-washed, machine-washed or dry-cleaned.
Natural fibres such as wool, alpaca and cashmere are generally more delicate than cotton or acrylic knits and often require gentler care.
2. Hand wash whenever possible
Hand washing is the safest option for most knitted sweaters.
Fill a clean basin or sink with cool or lukewarm water and add a small amount of mild detergent designed for delicate fabrics or wool. Avoid using hot water, as it can cause natural fibres to shrink.
Gently submerge the sweater and allow it to soak for about 10 to 15 minutes. Lightly squeeze the water through the fabric without rubbing, twisting or scrubbing, which can stretch or damage the fibres.
3. Use the washing machine carefully
If the care label says machine washing is safe, choose the delicate or wool cycle.
Place the sweater inside a mesh laundry bag to reduce friction with other clothing. Wash it in cold water using a gentle detergent and avoid overloading the machine.
Fast spin cycles can stretch knitted garments, so use the lowest spin setting available.
4. Never wring out the water
After washing, resist the temptation to twist the sweater to remove excess water.
Instead, gently press the garment against the side of the sink or wrap it in a clean, dry towel and press lightly to absorb moisture. Twisting can distort the shape of the knit and weaken the fibres.
5. Dry it flat
One of the biggest mistakes people make is hanging a wet sweater on a clothesline or hanger.
Wet knitwear becomes heavy and can stretch out of shape under its own weight. Instead, lay the sweater flat on a clean towel or drying rack, reshape it carefully and allow it to air dry away from direct sunlight or heat sources.
This helps the sweater retain its original fit.
6. Avoid frequent washing
Unlike T-shirts or gym clothes, sweaters usually do not need to be washed after every wear.
If the sweater is clean and odour-free, simply air it out for a few hours before putting it back in your wardrobe. Washing less often reduces wear on the fibres and helps extend the garment’s lifespan.