What if the sweater shrunk?

Many sweaters to wear long or frequent cleaning will shrink, proposed to sweater soaked, then add borax or white vinegar, join the quantity according to the amount of water, and then immerse for around 25 ~ 30 minutes, if the shrinkage is serious, can also be clothes pull gently, then clean after dry, if worried about the smell of vinegar can be cleaned with hot water.