Definition: Cleaning, when it comes to comic books, is used to describe the process of removing dust, dirt, and other harmful products to a comic book. It is a dangerous thing to try if you are an amateur and many professional restorers keep their methods secret so as to not promote competition. If not done correctly, cleaning your comic can actually bring down the grade and value of a comic.
Examples:
I've noticed some dirt and stuff on the cover of my comic and I was thinking about cleaning it.
