Generally, jumpers can be tumble dried in the washing machine, but you should pay attention to the method. (1) If you are using a washing machine to spin your jumper, it is best to use a laundry bag or other item to tie the jumper before dehydrating it, otherwise it will deform the jumper. (2)The dehydration time of the sweater should not be too long, about one minute is enough. (3) After dewatering, take out the jumper immediately, stretch it to restore it to its original state and then lay it flat to dry. When it is 8 minutes dry, use two or more hangers for normal hanging. If there is slight shrinkage or distortion, iron and stretch to restore the garment to its original size. For more details, please refer to: How to recover a shrunken jumper? 5 small tricks to recover in minutes. 　　The precautions for washing jumpers 1. the choice of detergent Only neutral and acidic detergents can be used, never alkaline detergents, because the dye used in jumper dyeing will be destroyed by alkaline. If you don't know what detergent to use, it's good to use shampoo that you don't want to use at home or is about to expire. 2. Water temperature control The water temperature should not be too high, 30-40 degrees of warm water is more appropriate. 3. hand washing and machine washing notes If you wash by hand, remember not to rub hard. Rubbing with force will make the wool sticky and elongated, and the wool will easily fall out. If you machine wash, put it in a laundry bag and wash it in the washing machine to reduce the lengthening of the wool due to the rotation of the washing machine. 4、After washing and drying Don't wring it out hard after hand washing, you can put it diagonally on a board or laundry board and press the water dry by hand; you can also put it inside a laundry bag and put it in the washing machine to tumble dry, you can also hang it inside a laundry bag to control it, you have to use your hand to push the jumper inside so as to prevent it from getting bigger. When drying, use a hanger with a shoulder bag to dry up, the clothes are not easily deformed and dry quickly, it is best to put it in the sunbed blue and spread it out to dry.