Good luck. I know that lye (and probably any lye-based powdered cleaners) work VERY well on hair and such, but I'm not sure about other organic materials. I went through a big ordeal with my bath tub. I could see some hair stuck in the drain strainer thing, and eventually grabbed my lye and dumped some in it. The water would slowly drain out, but was definately stopped up a good bit. After using lye, I eventually realised that one of the kids had put the drain stopper lever up, but not entirely. I felt like a complete and utter idiot. But, I did learn that lye turns hair to soup. Anyways, good luck with it!