What you should understand that the chip is not altered by cleaning. But, by having it cleaned by someone else any loss, by cleaning is by the the hands of the owner, and its his loss. Second, is, cleaning is NOT altering. Third, it allows you the buyer to se any imperfections in the chip. A PLUS for you. And last, if it doesn't look to your pleasing, squable and talk about it/$$ to your pleasure.

REMEMBER Cleaning OK