Nothing is more dangerous than getting in your car than to find all of the windows have fogged-up! You can prevent this by keeping a moisture absorber in your car. Start collecting those little silica packets that come in shoe boxes, jewelry, and clothing! Fill a sock and place in inconspicuous places in your car or you can just fill a sock with kitty litter for the same result. Of course, you can buy something at the auto parts store, but what fun would that be? The main thought is safety, so whatever works for you, do it.