Theres no stain on the glass. I had some armorall glass cleaner I was gong to use but couldnt find it so I tried windex. It took them off a bit but not entirly. I want to get them of and coat the windows so they wont spot again. I like really CLEAN glass. I know something out there takes it off b/c I bought a car once that you could tell the door mirrors were cleaned b/c around the outer rim of the mirror you could still see a bit of the spots and it looked like it had been cleaned on the rest of the mirror. Vinegar was and idea I just didnt have any.