The wipers on my Zafira seem a bit wonky. In explanation, the windscreen was replaced. The fitter did and excellent job, and no complaints there. Also I have some Rain-X on the windscreen. The wipers seem to scrape a lot near the bottom of their travel, and I am convinced that they sometimes catch on each other. Maybe I'm imagining things... Is it possible for the wiper arm to be bolted on the splines one or two notches out?
