foggy double pane windows on class A- help

This doesn't answer your immediate question, but if you're in the Washington area, Windows in Motion of Vancouver, WA will build and install new windows for you. They can also build new frames and screens right there in their shop. We had them replace all of our frames, glass & screens and there was a lifetime warranty if they should fog up again. I understand there's a similar shop in Florida, but I don't know their name.

Bill