Glad to hear about the partial solution kdum. I would also suggest that you make sure the touchscreen surface is clean, it may have difficulty reading input if there's a layer of whatever between the capacitance screen and your fingertips. Take off the screen protector (if you have one) and see if there is any improvement. Bringing it into an Apple Store and duplicating the issue may also be in your best interests; if it's within warranty they may choose to replace it if issue is still present after a complete restore.