I apply rain x before each trip.It takes about 10 minutes to do the windshield.Spray it on liberally,wait a few minutes,then rub it off.You will notice that it leaves a smear on your windshield.wait a few more minutes for it to dry further,then wipe it until it is clear.It takes a little elbow grease,just like waxing.Because of the shape of the windshield the rain just beads and rolls right off.You will be amazed at how little you need to use your wipers!
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