HTC Tattoo :: Touch Screen Not Responding Intermittently

Basically on Saturday it was raining hard where I live and I was out and about with my tattoo in my pocket. I used it a few times whilst out but made sure it didn't get too wet although I personally got drenched and the phone was in my wet trouser pocket! That evening the touch screen stopped responding completely, nothing would happen when I touched the screen at all! The directional buttons like home and menu worked however. I then took the battery out and put it back in, but still no luck, the touch screen was dead. Resigned to having to send it back to HTC, I left it switched off over night. The next morning I switched it on again and it started to work fine again!! No problems, so I thought the problem had passed.

But then a bit later in the day the same thing happened again, touch screen not responding but this time as well although I wasn't touching the screen the tattoo was pressing the touch screen button in the bottom left hand corner of the screen on its own!? So that made me think that the touch screen was indeed broken! I then performed a complete factory reset last night, and yet again after that the phone was working fine again. But then again when my alarm went off this morning, the touch screen was not responding again and the tattoo was pressing that same button again on its own, on and off. So I took the battery out again, left for a few hours, just turned it back on now and the tattoo is working fine again!