Lines running down screen of iPod touch 4th generation It's almost like stuck pixels- except they're moving down the screen...? Recently, after turning on a 4th generation iPod touch for the first time in two or three months, I noticed that lines were running down the screen!  Rebooting is not helping. Is a restore recommended for this kind of situation? Is it a hardware or a software issue? With iOS 6 due in less than a week, should updating fix this problem? How exactly did this happen to the hardware? Would replacing the screen resolve this issue, or would the problem lie deeper in the hardware?

edit restoring did not help; the lines were shown even when booting at the Apple logo and when showing the 'connect to iTunes' image.
Your display is dying. Replace the display or buy a new iPod touch.