1. Soak the sweater in warm water at 30℃-50℃, or steam it in a pot for 20 minutes, let 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 because the sweater is too long.

2. Inject warm water into the washbasin, drop a small amount of household ammonia water, and then soak the sweater, 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.

Pure wool sweater must not be washed by washing machine. It is best to dry clean or hand wash. Because the surface of wool fiber is composed of many scales, once it is washed by washing machine, it will destroy its excellent performance and affect its appearance.

Pour neutral detergent into warm water at about 30℃. After the detergent is stirred evenly, add clothes and pat gently with your hands. Wash it several times with warm water of about 40℃ until it is clean. Then add a little vinegar or softener to clean water, and finally put the sweater into a cloth bag and put it in a washing machine for dehydration 1-2 minutes.

Smooth the rabbit sweater and iron it with a steam iron at 120℃- 140℃. The iron can't touch the rabbit sweater directly. The rabbit hair sweater can be flattened and dried after it is shaped. This is a very good way to solve the problem of how to do if the sweater is too long.

4. When drying the sweater, in order to prevent the sweater from getting bigger and longer, it is best to spread the sweater flat and dry it, or spread the umbrella out and hang it directly on it.

Extended data:

1. Long-term boiling of knitted sweaters in water will cause partial hydrolysis of wool, which is more likely to occur in the main chain than in steam. The disulfide bond is broken, and wool is neither alkali resistant nor oxidation resistant.

Chlorine oxide can partially destroy the scale layer, so chlorine oxide treatment can prevent wool carpet from shrinking and improve dyeability. In steam or hot water, wool has a wide range of setting by tension, and it shrinks excessively at high temperature.

2. Dyes that can be used for knitting sweaters include acid mordant dyes and acid dyes. When washing with acid mordant dyes, wash with warm water of about 30 degrees. The washing methods are mainly scraping and pressure washing, not rubbing.

3. As for laundry detergent, multi-purpose detergent can be used, but neutral detergent is better for advanced sweaters, woolen finished products and fashionable clothes. If you want to dehydrate, it takes one minute for wool products, and less than 30 seconds for non-absorbent propylene and polyester products.

More importantly, after washing, put the clothes as flat as possible on the board, put the board obliquely, let the water flow down the board, and then hang it on the hanger to dry after the water drops are finished.

Baidu encyclopedia: knitted sweater