1. When choosing a sponge, its tactility and elasticity are the primary factors to determine. It should feel soft and malleable.

2. Since sponges are afraid of light, including the lights in the shops, the quality of sponges may be damaged. Therefore, when purchasing sponges, if they are displayed in a row, do not take one, but take the back ones, because the sponges in the back will not enjoy a lot of "sunbathing".

3. In addition, a practical way to distinguish is to fold the sponge in half and rub each other. If you don't rub it a few times, it's time to get rid of it. Wash your face; rub the foam in the palm of your hand, then use the sponge to increase the foam, then wash it.