What is the black gunk coming out of my shower?
Asked by occ (4036) May 13th, 2007
When I turn on the hot water, every once in a while black gunk comes out of my shower or bathroom sink. it's sticky, stains the porcelain, and I have no idea where it's coming from. Does this happen to anyone else? how do I fix it? this only happens about once every couple weeks.
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