1. White vinegar treatment method. First prepare a basin of warm water, add 50 grams of white vinegar, and soak the sweater in it for half an hour. After half an hour, take out the sweater, pull it a little with your hands, and put it in a dry place to dry. The sweater will recover. The problem of original shape and deformation can be solved.

2. Hot water treatment method. Iron the sweater with hot water. The best water temperature is between 70 and 80 degrees Celsius. The sweater will naturally shrink back to its original shape. But be aware that if the water is too hot, the sweater will shrink too small. If the cuffs or hem of a sweater lose elasticity, soak the part in hot water at 40 to 50°C, take it out and dry it for 1 to 2 hours, and the elasticity will be restored.

3. Steam iron treatment method. Hold the steam iron about two centimeters above the clothes with one hand, let the steam soften the fibers, and then use the other hand to shape the sweater. By using both hands together, the sweater will return to its original state of tighter fibers.

4. Conditioner treatment. Take out an appropriate amount of conditioner, rub it on your hands for two minutes, put it into the water and stir it so that it can dissolve into the water. Then put the sweater into the water to soak. After fifteen minutes, take out the sweater, wrap it and squeeze it. Once the moisture is released, the sweater will return to its original shape.