There's a special coating on your side windows that is put on there to shed water quickly in the rain... next time you wash your car, take the hose and throw a bunch of water on the window, and you'll see that the water can't get off of them fast enough... the hollow part of the arms that mount the side-view mirrors are designed to shove air through them and across the side windows, together with this coating, it keeps the side windows virtually free of water in the rain - I've driven in the rain a lot on some long cross country trips, and it really does work.

Anyway, I use Sprayway and it works great, doesn't leave streaks or swirls. YMMV.

brad

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21-year PCA Member
PCA DE Instructor