Okay to scrub Matte?

Long story short I had some nieces and nephews over and made the critical mistake of forgetting to put the PS3 high up. Can I scrub Matte to get rid of residue or would it ruin it not really hardcore scrubbing but maybe soak a napkin get the top nice and wet and scrub the residue off with a dry rag.

Matte won't scrub away will it? or is the actual plastic made out of the material.