I had head build up in cab of my Aveo and had the windows tinted with Sun Tek film. Now I found head build up to be more than normal in car. The climate controle (aircon) was checked by dealer and they could find no problem. They also replaced the cabin filter. The car stil build up heat in cabin and the window tint of 35% dont help at all to cool the car. What sould be my next step? Whould it help to fit DYNAMAT?