So I started doing a cleaning run for my new still with some cheap booze. Me and my infinite wisdom decided do it with sangria ...bad idea. A lot of artificial sweeteners and other crap in that stuff. So I ran it through, and it burned the crap out of the bottom of my Stainless Steel Milk Can/pot. I've already let it soak with soap and water. Nothing. Let it sit for 2 days with baking soda and water. Nothing. Tried Elbow grease. Nothing. I've been thinking of trying a 10% citric acid wash, but I'm thinking that won't help. I'd like to note that I've gotten a lot of it off (compared to the way it looked when I started), but there is a significant "burn sheet" in the center of the pot that won't come off. Do you have any suggestions? Do I even need to worry about it?
PS: At the tale end of the Sangria Sacrificial run, there was a yellow sweet smelling substance that came out right at the end. Anyone have any ideas what that is?