Optical lens cleaning
Generally, the method of blowing first, then brushing, and then wiping is adopted. Blowing means blowing off the attachments on the surface of the lens with a blower (or ear wash ball). But you can't blow air directly with your mouth. When it cannot be blown off, it can be gently brushed with a clean special cleaning brush. If there is still dirt on the surface of the lens after the above two methods, use a lens cleaning paper slightly dipped in xylene to wipe it gently.
If you find that the lens is moldy and foggy, you can wipe it with a lens cleaning paper dipped in a mixture of absolute alcohol and ether, but the liquid should not be too much and the residence time should be short, so as not to penetrate into the lens and cause corrosion.
Oil lens should be wiped in time after each use. First wipe it once or twice with dry lens tissue to remove most of the medium oil, then wipe it twice with xylene wet lens tissue, and finally wipe it once with dry lens tissue .