Need help with new iPod Nano touchscreen.

Got a new iPod Nano 7th. Through playing with it, if I restore it, works awesome, screen responds to light tough, responsive, scrolls. If I sync it, even with just a gig or so, touchscreen doesn't swipe left or right, have to really press to get it to recognize, doesn't recognize all touches, becomes erratic. Have restored and synced a few times now, back to perfectly responsive when restored.



Advice? Thanks!

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