My entry door window was badly fogged, along with a couple other windows. I removed the window, took it apart, installed new moisture absorbing gasket with a silicone barrier, reassembled and installed. You could take the window out and get 2 pieces of tempered glass cut, then reassemble.
I bought the supplies from DK Hardware.
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi