Clean the windows on a regular basis. Use GM Glass Cleaner P/N 1050427 or equivalent to remove normal tobacco smoke and dust films. A non-abrasive cleaner may by used on the outside of the windshield. Use the following procedure in order to clean the wiper blades:

1. Clean the wiper blades with a cloth soaked in a solution of water and GM Optikleen or equivalent. A solution of water and methanol may also be used.
2. Rinse the wiper blade with water.