Yeah the issue with Rain-X is that it's difficult to apply correctly. Once you get your application technique down it gets easier over time. For me, I tend to over-apply initially, and then let that set for a pretty good long time (10+ minutes) to fully develop that white haze, retouching any missing spots in the first couple of minutes when they become apparent. Then you have to practically grind the stuff off with a paper towel, it takes a lot of elbow grease to rub it down to the point where it doesn't haze up your windshield anymore.
Properly applied Rain-X is really nice, I hate driving in the rain without it. I almost decided to remove the wipers on my daily driver since I keep RainX on all the time, but there are occasionally times when you just need wipers and it would suck to be without them, unfortunately.
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