Pulled out my plate chiller on the weekend to build a stand for it for the brew cart. Took it to the Depot to look for hardware and was explaining how it worked to the guy helping me when I noticed it was crusty inside one of the wort ports. Got it home to take a better look at it and came to the embarrassing realisation that I must have put the damn thing away after brew day and not cleaned it out! What a rookie move! I've had it soaking in pink brewers cleaner (heavy chlorine smell) three times; after each I'd shake it and drain the gunk out of it. Last night I soaked it in a strong OXY-clean bath and dumped this morning with still dark green/brown stuff coming out of it. Soaking again now in Oxy. Has anyone ever done this and will the damn thing ever come clean?!