Started late spring when it got into the upper 80s/low 90s. The lower screen icons are non-responsive (especially the "OK" button after the lawyer screen. Once the car cools down (2-5 minutes usually) everything works fine again. Right now it is a minor irritation since I can use my phone for navigation. I've seen rebuilt units for around $400 but right now it isn't bad enough that I need to replace it. Anyone else have this issue?

 

I have never experienced this or heard of it. I would be curious if others have this issue. I wouldn't think you're the only one though!