Rain-ex, I just remembered it. I apply it when I hear it is going to rain, stuff really works. Put it on the side windows also and rear window on a car. Will have reapply it to the windshield periodically. I redo it between storms, as traffic throws crap back it will wear off.
It really helps at night on the R/R passenger window when looking to see if it is clear, you won`t have the water drops reflecting the light.
Glad this Wiper topic came up, good reminder to pick up a set today as Iam running around.
And it is always an IQ test to figure out how the dang things go on the wiper arms. It`s sort of, one size fits all with the plastic doo dads that come with them.
The old days you just bought the rubber insert, and slid it on.
Goat