Your car's windshields and windows are some of the most vulnerable parts of the vehicle. They are subject to being scratched and sullied by a variety of objects, such as rocks, pebbles, dirt and even insect bodies. Keeping your auto glass clean and protected from harm is not just about appearances; it's a safety issue as well. After all, if your windshield is dirty or scratched, your vision could be impaired while driving. Here is a closer look at how to keep your auto glass well maintained.