Completely immerse the sweater in warm water at 30℃-50℃, or steam it in a pot for 20 minutes to make it slowly recover its shape until it basically recovers, and then put it in cold water for setting. Finally, remember not to wring it out when drying, but to dry it flat. This is a very effective method when the sweater is washed too much.

Warm water is injected into the washbasin, a small amount of household ammonia is dripped, and then the sweater is immersed, and the soap components left on the wool will melt. Gently stretch the narrowed part with both hands at the same time, and then rinse it to dryness. When it is half dry, first open it by hand, straighten it, and iron it with an iron to restore its original size.

Steam iron to help. Put a steam iron in one hand about two centimeters above the clothes, let the steam soften the fibers, and then shape the sweater with the other hand. In this way, when two hands are used together, the sweater will return to the original state of tighter fibers.

When drying sweaters at ordinary times, in order to prevent the sweaters from getting bigger and longer, it is best to spread the sweaters flat and dry them, or open an umbrella to dry them directly on them.

Pour the laundry detergent into warm water and mix well. Put the sweater in, soak it for 15 minutes, and rub it as gently as possible. After washing, soak it in softener for three minutes. Don't wring it out. Just knead it into a ball and squeeze it. Finally, put it in a clothes drying column and dry it evenly.