What about the mold on the lens?

The lens will be moldy when it meets water vapor, and there is a subtropical monsoon climate like Shanghai, which is mild and humid. If you have a camera that has not been used for a long time, please keep it carefully. It is better to have moistureproof box with a little desiccant. Don't put the camera in the leather case and stuff it in the cupboard.

The mildew-proof method of "a grassroots man" in the forum of Oriental Sight Photography School is as follows: I only divide the lens into two grades: ordinary. Use rearview mirror cover and tail cover. Put a piece of absorbent cotton on the tail cover. Dropping medical alcohol for wet disinfection. Unusual. They are all shirtless. The only thing to do is to change the position and state of the lens every three to five times. Or stand or lie down.

If the surface is moldy, the easiest way is to put aerosol on the moldy place with your mouth, and then wipe it slowly with suede. If the interior is moldy, it can only be sent to professionals for treatment.