Same thing happened to my 5thGen Nano. But guess what it wasn't the humidity. IT WAS THE LACK OF HUMIDITY The screen was just the way you described. And I had been using it that way for about a month THEN - I laid it on the edge of the tub one evening during my bath. I forgot about it and retrieved it the next day. There was a bit of moisture underneath, not inside. AND THE SCREEN WORKED! It's winter here, and humidity runs about 20% After a while, the screen stopped working again. So I simply blew gently my moist breath into the connector hole. For about a minuite - and VOLIA! It works! Who knew! You do now!