Hey man! It’s a fewwww months removed from this post but you seemed to know what you’re talking about.
I think I have some wax that kind of tastes like burnt popcorn. I’ve been using the search bar and looking around this sight because I think it’s sulfur.
I want to do the copper test to determine it, and I want to do the process of removing the sulfur if it is. But to be honest, looking through these posts, a lot of it has gone right over my head and I’m quite confused. Anyway you could provide a ELI5 answer haha? 
I’m gunna give it a try but I don’t want to waste. Thanks! Sorry if i’m breaking any site rules. joined just to browse briefly.