1. Before wiping, use a dry rag to remove the dry dust on its surface.
2. Wipe the dust on the inner and outer surfaces of goggles with a wet rag. I wiped it several times, but some of it still can't go. You can soak it in a wet rag for about 20 minutes, and then wipe it easily.
3. If you feel that the brightness is not enough, you can wipe it several times with a rag stained with alcohol.
4. Finally, wipe the surface of the light mirror with a piece of deerskin cloth.
5. After use at ordinary times, seal the helmet with a large plastic bag to prevent dust from entering.