We have a tame windscreen guy comes in at work, I will ask him his opinion on this. I use a similar product which I bring home from the US it's called Invisible Glass and it's really easy to use on all types of glass. (We use it after the grandsons have been on the patio doors and conservatory windows etc. also good on oven doors.) You can usually get away without using w/wipers as the water just beads up and rolls off the screen.Has anyone else been told something similar?
The can next to the glass cleaner is a general purpose household cleaner called "Scrubbing Bubbles", a brilliant cleaner

Duly trotted off to my local Asda first thing this morning to find it's a fiver![]()