We have a 2006 Fleetwood Discovery. Several of our windows are foggy. We've had one (driver's window) repaired at Suncoast Design in Hudson, Fl nothwest of Tampa. We, and several of our friends, were very impressed with their work, price, and accommodations .
See the thread in this forum beginning on November 12, 2012 for more discussion on this topic.
Good luck!
Selene, NC