beer stone alright. use bar keepers friend with stainless wire brush, or green scrubber. or soak in powder brewery wash, or oxyclean type products. NO CHLORINE!!
"Back when I was in the pen, I used to beat my meat..."
"Damn ye, yellow-bellied sapsuckers; I'm a better man than all of ye milksops put together" - Blackbeard
"...I have really good sex moves; that I learned in China. I'm a sexual tiger; and feed on va-gine-a." - Jon Lajoie