If you don't have the luxury of being able to park your car in a garage at night then you have to deal with frozen car windows in the morning, who knows maybe it's so cold in some places right now your car gets frosty even if it's parked in the garage. I remember winters in Montana and like an idiot I would be driving with a teeny tiny patch scraped in the front, forget about seeing out the side windows or anything behind. I'm lucky I didn't hit somebody or something.
You can keep your car windshield and windows from getting frosty by using three parts water, one part vinegar, pour mixture into a spray bottle. Spray your car windows with the solution at night when you park your car, it will help keep the frost from building up. You want to make sure the vinegar is diluted, straight vinegar can harm the rubber in the window seals and wiper blades.