Moin, the old windscreen wipers on my vehicle (were already at the time of purchase) were over, so new ones had to come. Bosch were on it, so it should be Bosch again, why not? For my Astra H the AeroTwin, so bought and mounted fit. On the first rain ride I noticed that the windscreen wipers always squeaked during the change of direction. Not nice, but also not completely bad. On the advice of a friend I once had windshield wiper and Sche ibe cleaned, first they squeaked, which then went away after a few minutes. So I then had a week or a little longer complete rest in the rain and was happy. Then the car stood 3 days and suddenly the windshield wipers squeak like hell. So disc cleaned with alcohol, windscreen wiper dismantled and under running water cleaned neatly. Problem was solved, for a rain ride. The next day (today) the windshield wipers squeak louder than ever before, not only at Change of direction, but over the whole movement bandwidth; terrible. Tip from the Internet: thoroughly free the disc with silicone remover from fat, wake and other residues, unfortunately no success. What can I do? With every other driver the windscreen wiper seems to work silently and I have to beat myself with such a crap, I get aggressive with every disc wiper movement and little bit more. That can’t be. Of course, they were not used dry or on ice on the disc or anything else. I despair!