Can windshields just become too rough for smooth wiping?

[pmay805]

I've cleaned the windshield intensely and used glass polish and new wipers. The wipers still squeak & jump slightly at the end of their stroke up (driver side only). When I run my finger over the glass in that area I notice it feels smooth for an inch and then not smooth for an inch. It's as if some 1 inch streaks run down the glass in the last 6 inches where the wiper engages. Any thoughts or ideas on how to repair such a problem?

[screenman]

What sort of car?

[pmay805]

2003 E500 Mercedes

[screenman]

I have a funny feeling they had a problem with the wipers juddering on that car, do a Google for any information. I certainly remember a lot with scratches from the wipers, but that could have been because they did not convert to RHD very well.

[pmay805]

the wipers were 'very' smooth for 2 years, then after rain-x they could not be quieted. What is RHD that you refer to?

[screenman]

Right hand drive. Then the Rainx or its application must be the problem, I have never used to stuff so I will not comment further.