Just wondered if anyone knows what will get this stuff off the glass without too much work, I'm pretty sure I can get it off with a good scrub of bicarb or t-cut but wondered what might just dissolve it, I don't think virosol is the right stuff (tell me if I'm wrong) as this isn't just grease or anything, it's really etched into the glass and theres loads of it on one house I'm doing again next week and a fair bit on one I did couple days ago.
Would tfr do it?.
Would tfr do it?.