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As for how they wipe, and how the sprayers work, I don’t have any of the problems that others have mentioned here. The drivers side wipes just as well as the passenger side, the spray is evenly distributed from both wipers, and I don’t have to use excessive amounts to get the windshield clean. I would suggest that if you are having those types of problems (ie, mechanical) that you take it to a service center.
I use the left stalk tip button a lot when it rains.