I've got a problem. Parked in the wrong place at the wrong time a few days ago and came back to find a milky white liquid had dripped onto the top of my windscreen and ran all the way down and subsequently dried. Didn't really think anything of it at the time, but after washing the car today I can still see where the liquid was/still is as if it's eaten its way into the glass and left a permanant mark.
No amount of scrubbing with a generic glass cleaner seems to shift it. So, i'm turning to you guys and girls to recommend something I can use to get rid of it.