First use of blowing off the dust ball lens, very fine dust, due to the surface by the molecular surface of the lens can attract, was adsorbed by the state, is not easy to blow off, use a soft brush gently brush (brush usually should be stored in a tight box, oil, pay attention to not contact finger brush head, use should use the lens of water to brush scrub, reoccupy cloth wipe). Secondly, if the lens is coated with oil or fingerprint, blowing, brush is invalid, then we must use clean soft cotton is the sign of the son (or wipe mirrorpaper) coated with a little water and gently wipe the lens, not with ethanol (alcohol), carbon tetrachloride, or other cleaning liquid. Don't just wipe the dirty clean the lens, the mirror must be gently along the radially outward from the center line to wipe, and continue to replace with clean cotton swab. Don't do circular motion, and clean the disc like this.
Finally, in the lens of water wet, and then clean cotton swab to gently wipe the lens surface of an article. Touch lens is strictly prohibited in the cleaning process, cleaning to immediately cover the lens cover.