回答“How can I fix my iPod touch 4th generation screen sensor?”Not so fast. iPods just like any other computer system have the tendency to freeze up. If this is the problem, the solution is just to power cycle it. Oldturkey03 was on the right track. However, if your screen freezes, you will not be able to 'slide to power off'. Don't worry though, there is another way. Hold down the power/sleep/wake button on top and then also press and hold the round bottom button. This is the same way you force off the older non-touch screen iPods. The combination of both buttons being pressed and held for some time will force the iPod to shut down. Then just wait 10 seconds or so and hold power/start/wake button again to power it back on. Once it is back on, the touch screen should work again.