1. Unpick the dust guaze
2. Clean the dirt by air gun
If you have no the air gun
You can remove the inside gauze to clean
After the dust gauze totally dry
3. reinstall the dust gauze
TE:+86-20-89301885
FAX:+86-20-84309967
SKYPE: teyuchiller
Email:marketing@teyuchiller.com
Website: http://www.teyuchiller.com