So for some reason, in a flash, my mighty mouse decided not to scroll down any more. I doesn't click when I scroll down, almost like whatever it rolls to scroll down isn't getting rolled. It'll catch and roll for a little, but keeps slipping. It rolls up, left, and right, but not down. First off, does anyone else have this problem, if so can I fix it? And if I can, is there a way I can open it up and take a look at the insides?