My mechanic replaced them last year, and the driver side wiper seemed to get stuck at its tip when the windscreen was not saturated in water. I had thought that they just stuck to the screen a lot better than the originals, and the rubber blade was sticking.
About a week ago I was driving home in very light rain. The blade kept getting stuck and then pinging up. At one stage it got totally stuck (and bent) and I had to give it a nudge with my hand.
I now realize that the wiper arm is reaching the end of the screen and catching on the rubber that holds the windscreen in place.
I thought this could be a problem with the nuts holding the motor to the car, they seemed tight. I loosened and re-tightened to no avail. Any ideas? Is the blade that was put on just too long?