Acid Water
Mixture of 50/50 methylated spirits and water
wash it off with water
By keeping the windows clean inside and out and don't hang stuff off of the rear view mirror.
use bread and grease
fastest is to scrape it off.
Goof Off will get rid off it.
try mr clean magic eraser they clean just about everything off
If you rub an ice cube on it, you may be able to scrape it off of the material. Oil, like cooking oil, will also help it dissolve, but then you have to clean up the oil.
rinse in water
Yes it does
I use one of those straight razor holders and scrape it off.
it could be that your relay is stuck on. your passat windows can be lowered or raised when car is off.