Ok, I've

ed and read for hours, but didn't find anyone with this particular issue.
I've had my Xenarc 700TSV in my car for a little over a year now, and it's been working perfectly until just recently. It has started acting funny when first coming up.
When I first touch it after the OS is up, sometimes the cursor is to the right of my finger about 1/2 inch. Same results when I use a stylus. After I touch it about 10 or 15 times, it gets back on track. Sometimes it takes about 20 or 30 times to do the trick.
It doesn't do this every time, and there is no noticable pattern as to when it's going to happen (heat, rain, how long the car has been off, etc.) Has anyone else seen this problem. What could it be?