I just don't see what the problem is here. Mine works great. It sits in an air conditioned house, then rides in an air conditioned Jeep to the range where it gets used in some pretty rough conditions (shade but no A/C.) Hell, I even took it out once this year when it got up to 95deg that day. Pretty brutal conditions if you ask me.
I can assure you I've never had a problem with mine!
All kidding aside that is a real shame as I really like mine. It's fast, easy to use and the reticle doesn't "bloom" like my Aimpoint tends to. I thought they had most of the gremlins fixed with the XPS version, apparently not. Mine actually has been a great sight but I've never put it through anything extreme. That said, leaving it in the car on a hot summers day while you eat lunch at your favorite burger joint could put this sight over the edge according to the report. It might be time to consider a replacement.
