I was told to take a green scrubby to it in the sink with some cleaner, rinse well, and then soak in Starsan or a 5 gallon solution with 1/2 cup white vinegar.
Rinse after soaking again. Suppose to come out like a new shiny penny.
Schöne Blondine Brauerei
Closed-System Pressurized Fermentation - the future of homebrewing today...!!!
“Simplicity is the ultimate sophistication” – Leonardo da Vinci
"A set back is the opportunity to begin again more intelligently" - Henry Ford