My 08 National Pacifica also has foggy windows. We have gone to Suncoast Designers in Hudson Florida and love the place. An appointment is necessary and certain times of the year they are busier than others as the snowbirds move north or south.
They have a few RV sites with full hook up. We usually pull in about 4 pm and set up. They will come over and take the particulars of which windows you want done. Next morning, 7 am or so, they knock on the door, let you know they’re there and remove the window, cover the hole and take the window to the shop. Later they bring it back, install and you’re done.
Each window is $250.00. The last one I had done was two years ago, was the drivers’ side window, (large window) and it’s still like a new window. I highly recommend Suncoast. Great professional, specialist service.