The n95 mask is not a disposable mask. In this special case (resource shortage), it can be reused. However, a new mask must be replaced in the following situations:
1. When n95 receives contamination such as saliva, blood, tears and other body fluids, it must be replaced
2. The user obviously feels that the breathing resistance is greater than before and must be replaced
3. The mask is damaged and must be replaced
And n95 masks can not be cleaned. Now the filter cotton of the masks adopts the principle of electrostatic adsorption. Once cleaned, the filter cotton structure is easily damaged, resulting in poor protection.
