I'm trying to disassemble my UMBP 15" down to the keyboard so I can clean it up from an unfortunate accident. I've got the proper tools and all but can't for the life of me get half the screws out. Is there some trick to getting the motherboard/superdrive screws out? Half of them seem to be in so tight that I don't know how they weren't stripped going in. Any advice is appreciated as I'm starting to become a tad bit frustrated.