Very slowly some object in my phone is moving in front of the screen. It is at the bottom of the screen just above the buttons. It started out just barely visable and at the time I thought I just had some dead pixels. However, over time this object has continued to move up the screen. It appears to be some sort of black plastic. It is under the glass but above the lcd screen. In the middle it comes up to about a milimeter then tapers off to nothing towards the sides. If anyone knows anything about this problem I would love to know about it. Should I just take it in to the store?