foggy double pane windows on class A- help

well I ended up doing a DIY fix that worked out well. I removed the window from the rv and placed it on sawhorses. Then i taped up the inside pane completely with duct tape, and took a center punch and tapped it a couple times, hard enough to shatter the tempered glass. It pulled out with the tape leaving just a few pieces to vacuum up with the shop vac. It apparently had been fogged quite awhile as the outer glass was etched and would not defog with just window cleaner. I took some very fine grit sandpaper (1500 grit) and wet sanded the glass lightly. Followed up with turtle wax rubbing compound applied in a straight line motion instead of circular. Wiped clean with a damp paper towel and it looks great. Finished by removing the worthless rubber gasket around the frame and applied pro flex sealer instead.

Hope my experience helps someone else