human
What's the best way to keep my car's windshield from fogging up in the winter?
assistant
The best way to keep your car’s windshield from fogging up in the winter is to use a defroster or anti-fog product. Make sure to clean and dry the windshield before applying the product, and be sure to follow the instructions on the package. Additionally, you can also try using a heated windshield washer system if available.