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White vinegar or meths or IPA/rubbing alcohol added to the water can help.
I just clean the screen with meths and wash the wipers too. But have shit wipers that were replaced and are crap. Also drop a little lube on the wiper pins so the wipers have free movement to apply pressure to the wiper on the screen.
Try pure concentrated, it sure gets clean!
Or dilute it less than the recommendation. I love getting a clean windscreen, OCD love at the push of a button