Dear Car Talk: I have a 2015 Yukon XL with a cloudy inside windshield. It looks perfectly clean until the sun or oncoming headlights shine on it. I have tried to wash it with glass cleaner, and also plain water. When I go to dry it, it streaks really bad. One time, when I took it in for service, I asked the service representative if the manufacturer had put some kind of film on it.