I have some weird/concerning gunk in my Keggles. After my brewday, I "sorta" rinsed out my keggle and refilled both my keggle mashtun and keggle brewpot with water and oxyclean. I kinda forgot about it after about a week. I went downstairs to find that both keggles have what appears to be hard water stains or oxyclean stains on the walls of the keg.
I then boiled it for about 15 minutes in water, and it seemed to make it worse. Anyone know a surfire way to get this stuff off? Would I ruin a keg by putting some clr on it and trying to remove it?