Black gunk in bathroom sink

Old 04-01-18, 08:49 AM
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Black gunk in bathroom sink

I keep getting a build up of a black gunk in the bathroom sink drain. What is it? I can clean the drain and in six months the build is back.
Old 04-01-18, 09:28 AM
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Soap, tooth paste, hair, shaving cream, etc!

Hair is the main culprit, it gets hung up on the stopper lift rod and then everything else just clings to it!

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