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Yup, wipers were changed around March of this year.

Yes, the initial problem is definitely solved. Water is beading uniformly across the windshield.

If you read the comments to my first post, it has been implied that there was a coating from the factory. It wasn’t me that put that idea out there. I applied rainX last week. Today is the first rainy day since application. Wipers are stuttering significantly. Easily described as ‘uneven...

No, I’ve not owned a car before. That’s why I’m asking dumb questions on a car forum, which to be honest I expected to be less full of dipshits. For what it’s worth, I’m an engineer with a masters degree - and I can play a musical instrument. Thanks for the serious responses from a few of you...

Not obvious, no. So far I’ve been told -I washed away the coating -the wipers wiped away the coating -there is no coating -I have applied a coating to only the wiper area. seems the solution is to try and clean and polish the windshield then apply rainx, but I’ve been given different...

Fair point re: friction - I was more asking the poster who attributed the issue to my cleaning.

Those both seem like reasonable replies - but why has the coating selectively come off from the wiper coverage area?

Hope this has not been covered elsewhere in these forums. I've got a late-2018 model 3, and am located in Vancouver BC. We have reasonable amounts of rain, so wiper functionality/good rain visibility is (obviously) important. I'm having difficulty seeing through the windshield in heavy rain...