I'll give the exact opposite of this opinion. The Rain-x windshield fluid turned my clear hoses on my civic PINK!!!! It also ruined my $11.00 Micro-edge wipers. The rain-x does affect things. I can't seem to remove the wiper tracks that appear when spraying the windshield with a hose. You do have to constantly rewipe it on and then it only lasts a short while. It severely dried out and even ate away at my rubber wipers. After it wears off, it leaves a permanent haze (not visible, but when raining you can see why there are wiper tracks). It is good stuff when it's on. Really helps when your muddin. It's just the after affect.

Oh, and the de-icer or winter rain-x DOES leave a greasy film on the windshield!!! My dad had to run it all out and flush the reservoir with dawn soap and water 3 times. DO NOT use that stuff. It's a logical idea, but the key is YOU HAVE TO WIPE OFF THE HAZE- you can't do that at 45 mph.