1. Soak vermicelli in warm water. First, after pouring warm water, add a spoonful of salt. Adding salt can increase the ductility of vermicelli, make the foam of vermicelli tough and not easy to break, and make the taste soft and lifeless.

2. Then cover and soak for 15 minutes, and the fan is completely soaked.

3. The foam fan can't use cold water or boiled water. If you soak your hair in cold water, it will take a long time. If boiled water is used, it is easy to make fans sticky and become a ball.