Are you cleaning the windscreen according to the ceramic coat guide?
I've not looked into this field of ceramic coating yet, but assuming it's the same as what is applied to the paint then wouldn't a glass cleaner be an abrasive and could possibly be eating away your coating?
I would also go so far as to suggest you're ageing your wipers by cleaning them with the same solution too.
I use Duragloss glass cleaner and once a year or so I take a clay bar to my windscreen. The wipers I clean during a car wash by pinching the blade and running the micro fibre wash mitt down the length and let it air dry.
I still see skipping occasionally, typically when the car isn't washed for an extended time and wiper use is fairly constant.
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