Rain-X treatment is a few bucks a bottle, for about 6 or 8 ounces. This is the stuff you apply to the glass by hand. The washer fluid in the 1-gallon bottle pre-mix is 2 or 3 bucks as I recall, and pink in color. You can also get a 10 oz (or so) bottle of the washer fluid additive, also pink, that you mix with conventional $1/gal blue fluid.

Brent
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