Car glass must be washed with soap and water before any glass cleaner touches it, so it’s best to plan on washing your entire car. For windshields and windows that truly feel invisible, follow the wash with glass cleaner and a glass treatment. Glass treatment products protect the windshield and windows from contaminants and help prevent water spots by allowing rain to bead up and slide right off.

Don’t forget that you should clean the inside of your windshields and windows, as well.