I have had my F500Bt for over a month now. Over the month the touch screen has slowly been getting worse. This morning it did not work at all??? When it boots up I cannot even get passed the GPS "OK" button. I reloaded the firmware update again and still no response with the touch screen, nothing on the touch screen works. Is there anything I can do? I bought it from 6th ave electronics and it has been over the 30 day return policy. Any ideas?