I had to reboot my phone tonight and once the apple logo came up, I notice a dead/stuck pixel just to the left and below it. It kind of irked me. It wasn't like that before and now it is. Why would it just die all of a sudden? If I leave the phone off over night would it help fix it or is it gone for good? It's not noticeable at all during normal day to day use. However, I can't ever have a black screen. It would be very noticeable. Any suggestions?