The paste itself can help just because its gritty and there is some kind of coating on the lens. I'm not sure how your eyes handled the mint in your mask but good for you. After I cleaned mine with toothpaste, spit has worked ever since. Some guys I dive with have to use anti-fog all the time, iv never had that problem. A quick pass over the glass with a lighter, just enough to leave some soot will also take the film off the mask.