How to get grease off a windscreen?

[Navajo]

How do I remove this grease from my windscreen?

I’ve tried meths and washing up liquid. Doesn’t help.

[Navajo]

Just tried a bottle of vinegar (sarsons) didn’t help

[Navajo]

Bought some mer, I’ll see if that works when it comes next week. If not ill get some thinner and try the vinegar again