After wearing the mask, do not touch it to avoid reducing the protective effect. If you need to touch the mask, wash your hands well before and after touching.
When removing the mask, do not touch the outer part of the mask as it may be contaminated with bacteria.
After removing the mask, put it in an adhesive tape or paper bag, wrap it, and put it in a trash can with a lid for disposal.
Replace the mask at least once a day, and if it is scratched or dirty, replace it immediately.