This is my first time building a computer, so I am wondering if this mistake I made will be a problem. The shipping was still messed up, even on my RMA, so I am keeping it. The styrofoam packaging detereorated, and there is green styrofoam dust all over the heatsink. I was using a compressed air duster to spray off the under side of the heatsink, where it attaches to the processor, and the grey stuff sort of got hit with the duster straw. It left a little mark in the grey stuff. Is this a problem?