New Wipers Leave a Mark on the Windscreen

Joined
Oct 30, 2020
Messages
52
Location
Cornwall
Car
SLK
Hello everyone!

I recently replaced the Bosch Aerotwin wipers on my CLS to a new set that were identical. With the new wipers, I have noticed that on the driver's side wiper, when in operation, leaves a line on the windscreen wherever the tip of the wiper has travelled. Therefore, when I stop using the wipers and the windscreen dries, there is a curved watermark going across the screen where the tip of the driver's side wiper has travelled. I was wondering if this is normal? I hadn't used the old wipers in many months so cannot recall if they had the same issue as well. Many thanks in advance.
 

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