Hello, sorry for bumping up this thread. I have also encountered this problem. The watermark remover I used is from waxco and it stated there can be used in windscreen and nw my windscreen is ruined. Does anyone configured out any solution?

I come across this thread and realized many of us encounter the side effects after using the watermark remover / cleaner.

So far any good alternatives that are able to remove the watermark without having any problem?
My perception is IPA (Isopropylachohol) which is good in removing most of the dirty, but I am not sure for the watermark which could be the hard water that rich with minerals and impurities.

Anyone tried (diluted/non) bleach?