Blow off the dust stuck to the lens with a balloon first, and blow from the center of the mirror to the edge, so as not to touch the mirror. If you can't blow it off, you can gently brush it off with special lens paper or special lens pen.
If there are fingerprints and water stains, first breathe on the lens to make it moist, and then wipe it clockwise or counterclockwise with lens paper. Before wiping, make sure that there are no visible dust particles on the surface to avoid dust particles from rubbing the lens.
For indelible stains or oily stains, use special lens cleaning solution to clean them. When cleaning, use absorbent cotton balls to dip a little cleaning water solution, squeeze out the water, keep them moist, wipe the mirror in a circular motion, blow dry with a balloon after removing the stains, and then clean them with lens paper. Do not spray cleaning liquid on the lens surface.
Third, the LCD screen: cleaning, film pasting
LCD is the most easily scratched, scratched and dirty part of the exterior of digital camera. Some cameras have plexiglass protective layer on the LCD, just wipe the glass clean.