Garmin 600t screen senses "ghost" touches

[+Wagonmaker]

Need help with my Garmin 600t. There is a problem with my touchscreen, which has made the GPS very frustrating to use.

 

The touchscreen senses "ghost" taps sporadically, at times several each second, which severely affects its functionality. It's like it thinks someone's touching the screen when no one is. The majority of the "ghost" taps are located near the bottom of the screen, but not all of them. I have had this GPS unit for about 3 years (I think). This problem began about four weeks ago, and I have tried doing a software update, and resetting and restoring factory defaults, but the problem persists. I have also adjusted the screen sensitivity to the lowest possible sensitivity. Sometimes I turn it on and it works fine for hours, other times it begins sensing ghost taps right away, to the point of not being able to do anything at all. Locking the screen and waiting a few seconds sometimes helps the problem go away temporarily.

 

Has anyone else experienced this strange problem? I've contacted Garmin and their suggestions have not worked.

 

Thanks in advance!