If your car lock is frozen shut, there are a few things that you can try. Before you do anything else, check each door. If you're lucky, you will a door you can open to start warming the car up from the inside to help defrost the locks. If that doesn't work, you can use a de-icing spray or WD-40 to spray the lock and accelerate thawing. You can also try heating up your key with a lighter or hair dryer. If you can't get it open or your key gets stuck, it's time to call in a professional auto locksmith to save the day.