I've started having this strange problem with my iPod Touch's screen. When the iPod is fully charged the touchscreen wont respond. Leave it alone for a few hours to run the battery down a bit, and suddenly the touchscreen responds again. The screen comes on and shows the "slide to unlock" message, but doesn't react to touch anywhere on the screen. Once the battery has run down some the screen will react again as if nothing had happened. Anyone have any idea what's going on with it?