![bathroom - What is this black stuff that appeared on my drain after cleaning with a bleach-based cleaner and how do I clean it? - Home Improvement Stack Exchange bathroom - What is this black stuff that appeared on my drain after cleaning with a bleach-based cleaner and how do I clean it? - Home Improvement Stack Exchange](https://i.imgur.com/6Ux9Q4o.jpg)
bathroom - What is this black stuff that appeared on my drain after cleaning with a bleach-based cleaner and how do I clean it? - Home Improvement Stack Exchange
What the heck in this ugly black stuff? My wife has been complaining about a nasty smell coming from her bathroom sink since we moved into our new house two years ago.
How to clean years of accumulated gunk from kitchen sink piping | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
![tub did not drain black stuff in water came up from drain - Picture of Baymont by Wyndham Bartonsville Poconos - Tripadvisor tub did not drain black stuff in water came up from drain - Picture of Baymont by Wyndham Bartonsville Poconos - Tripadvisor](https://media-cdn.tripadvisor.com/media/photo-s/10/89/13/51/tub-did-not-drain-black.jpg)