Do digitizers go bad??? My original touch screen cracked, so I replaced the digitizer 3 months ago, worked fine (for 3 months), but then the new digitizer abruptly and completely stopped working! (I was playing music at a friend's house and when i went to change the song, no touch! Hasn't responded to touch since) Everything else seems fine (home button, lock button, volume). I took the screen out, checked the data cable connection, restored the ipod, but the touch screen won't respond! Any ideas???? Should I throw down and buy a (third)/new digitizer?