Kevin McMurtrie <mcmurtri@dslextreme.com> wrote in message news:<mcmurtri-CAA77E.21520528012004@corp-radius.supernews.com>...
> >
> The ingredients are probably on the saftey are of the label. Methanol
> and the various glycols are bad. Isopropanol and ethanol evaporate too
> quickly to matter.
>
> Alcohols are mostly used as anti-freeze. One that's not freeze
> resistant is less likely to have alcohol. Strong concentrates are
> diluted with plenty of water.
>
> My favorite summer wiper fluid is a couple of drops of hand-wash dish
> detergent in purified water. There's no mess or streaking on hot, dry
> days.
>
> My favorite winter wiper fluid is a spoonful of powdered laundry
> detergent per gallon of water. It causes water to stick to the
> windshield in a continuous and smooth film. There's no haze after the
> wiper blades go by. It unfortunately makes a chalky mess if it dries on
> the car. The chalk doesn't seem to hurt the paint but maybe you don't
> want to experiment on a nice car.

You must live in a warmer climate. I'm pretty sure your winter wiper
fluid formula would freeze and bust all the wiper components if I used
it here.