![When I clean my sink drain cover it's mucked with this black grime. My husband's sink doesn't have this problem. What could it be? : r/whatisthisthing When I clean my sink drain cover it's mucked with this black grime. My husband's sink doesn't have this problem. What could it be? : r/whatisthisthing](https://preview.redd.it/kuwxtt258sn21.jpg?width=640&crop=smart&auto=webp&s=493c86c610b6017fe8d0b5c56854c0f5eaafc8cb)
When I clean my sink drain cover it's mucked with this black grime. My husband's sink doesn't have this problem. What could it be? : r/whatisthisthing
![Any idea how to clean this overflow hole in my kitchen sink..? It's useless like this. : r/CleaningTips Any idea how to clean this overflow hole in my kitchen sink..? It's useless like this. : r/CleaningTips](https://preview.redd.it/any-idea-how-to-clean-this-overflow-hole-in-my-kitchen-sink-v0-x9e752ph21o91.jpg?auto=webp&s=5c36ac7ecb352805e6564b8f96d99a31f8bde48b)
Any idea how to clean this overflow hole in my kitchen sink..? It's useless like this. : r/CleaningTips
![Mildew/mold growing out of the sink overflow hole - Picture of TownePlace Suites by Marriott Mt. Laurel, Mount Laurel - Tripadvisor Mildew/mold growing out of the sink overflow hole - Picture of TownePlace Suites by Marriott Mt. Laurel, Mount Laurel - Tripadvisor](https://media-cdn.tripadvisor.com/media/photo-s/15/17/85/86/mold-growing-out-of-the.jpg)
Mildew/mold growing out of the sink overflow hole - Picture of TownePlace Suites by Marriott Mt. Laurel, Mount Laurel - Tripadvisor
![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)