[NFLDMNBB]

I found using cheap distilled white vinegar in warm water -- Ratio of 2 cups Water (500 ml) 1/2 cup Vinegar (125 ml) You can also add one small drop of Dawn Dish Detergent which will make the glass shine. Dry with crumpled up newspaper or a clean old t-shirt . If you are doing a regular car with many windows you will want to change newsprint often to avoid leaving lint on the surface.

An old dish cloth works great for washing (let it sit for a few minutes) if the glass is covered with bugs!

Roger