Used to get that in my car a lot, and cos it's -degrees here a lot it freezes, have to scrape the windows on the inside, rather annoying, till I got tipped off by a mate to turn heaters off and open windows last 5 mins of journey to let inside of car get to same temp as outside, prob solved, just freeze my nuts off for those last 5 mins. Wish i could park safely right outside my house and leave windows open while I sink my first beer inside the house...