Cant believe this hasnt been mentioned but I use Zaino on my winshield. just like the body i use it on everything. Doesnt streak like rainx. put on z5, wait 15 min, take it off with micrfiber. Then use just a little bit of z8. Just apply with microfiber and its good for a lot longer than rainx in my opinion. Hardly need to use wipers while driving.
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