run some pbw or oxiclean through and around(submerse if you don't have a pump) and rinse with no rinse starsan, or homemade nrs(1oz vinegar in 5 gallon of water diluted and then add 1oz bleach), and it will be clean... convering will be fine, but for almost the same money, and ease of use, you could build your immersion chiller into your bk for a heat exchanging coil, so that if you ever get a pump, you could use if for a herms system...
I think it's too bad that everybody's decided to turn on drugs, I don't think drugs are the problem. Crime is the problem. Cops are the problem. Money's the problem. But drugs are just drugs.