The main reason of clothing hardening is: 1. Clothing fabrics are softened before leaving the factory, but as long as they are washed once, most of their soft and hard components will be lost, and clothes will become hard and inelastic; 2. In the process of washing clothes, tiny fibers are often entangled, tangled and even broken. After repeated washing, it is difficult to maintain the original smoothness, ductility and elasticity of the fiber. What emerges is that the whole dress looks old and deformed and feels stiff. The more times you wash clothes, the more obvious this feeling becomes.