I just received my third iPhone 3GS. Everything seems fine except for a fairly big piece of dust stuck under the bottom left of the glass. It isn't in the way of the screen, but it sort of shines in light, making it noticeable and stand out more than the iPhone 3GS's display. I don't think I want another replacement, but I'm curious if anybody has even been able to remove dust under their display without opening their iPhone (I'm sure it would be hard to take the display apart and put it back on without fingerprints, marks, dust, etc.)? I'm also wondering if the dust could move over time to get in the way of the display? Thanks in advance.