Okay, I have a mostly full bottle of generic gasline antifreeze which, despite the warning that it contains methyl alcohol, seems to contains a significant percentage of isopropyl alcohol. Different burn characteristics that HEET and it leaves sooty resin on my pot. It doesn't list the contents by the way. I also have quarter full bottle of HEET. Can I safely mix (and then use) the two? It seems like this wouldn't be a problem, but I spent my highschool afternoons hanging out in parks rather than attending chemistry class, so I thought I'd ask.