I was driving today in a cold night (35 F) and turned on the heater in my car and all the windows incl. the windshield got frosted from the inside of the car. I don't know how to use the defroster and had to resort to stopping my car in a safe place and wiping the insides of each of the windows manually. Again if I start my car, the windows get frosted from inside within a few mins. Should I use the defroster? Please help; I am a new driver and don't know much about using cars.