I've had my iPhone 5 for a week now, but the other night I noticed a mark on the camera lens. I've been babying this phone so I can't understand how the lens got scratched. When I move it in the light, I can't even see any marks or hairline scratches, which causes me to believe the scratch/crack or something might be on the inside of the lens. It might even be a piece of plastic shaving or something stuck in there. I can't see how I scratched it if ifixit couldn't even scratch it with sandpaper. Anyways, is this bordering on OCD? Or should I get a replacement tomorrow?