I'm trying to diagnose a problem on an 3rd gen iPod Touch. When waking it up, from the home or sleep button, the screen has a flash of whitish horizontal lines that overlay the lock screen. The odd thing is they seem to be more bold when waking only a few seconds from sleep. There is a gradual lessening from 1, 2, 3, 4 and 5 seconds. At 5 seconds they aren't actually perceptible. Resetting, restoring, erasing and restoring don't have any impact. I am thinking it's the digitizer and it's just showing it's age. There is no quality issue with the screen during active usage. Any thoughts?