Clean glass not only looks better; it helps you drive better. Clean, clear glass looks beautiful next to clean, waxed paint, and it improves your visibility while driving. Just a few extra minutes detailing your windows will add a sparkling touch to your vehicle’s finish and just might save your life. Glass is the final step in car cleaning, because it can be completed without affecting the finish on other surfaces. Shampoo can get most of the grime off the outside of windows, but the inside still needs doing, plus those often-forgotten strips tucked inside the glass runners will need tackling.