![what's this and how do i stop it from happening? it looks black and it's also around the very top of the bowl : r/CleaningTips what's this and how do i stop it from happening? it looks black and it's also around the very top of the bowl : r/CleaningTips](https://preview.redd.it/whats-this-and-how-do-i-stop-it-from-happening-it-looks-v0-cdutr5booh091.jpg?auto=webp&s=684d35c099b47a22a5237a0f4fa5458c72c5971b)
what's this and how do i stop it from happening? it looks black and it's also around the very top of the bowl : r/CleaningTips
![What is this black gritty residue in my toilet and how can I stop it from recurring? It returns within a day or two after cleaning. : r/CleaningTips What is this black gritty residue in my toilet and how can I stop it from recurring? It returns within a day or two after cleaning. : r/CleaningTips](https://i.redd.it/pual7gb7khs91.jpg)
What is this black gritty residue in my toilet and how can I stop it from recurring? It returns within a day or two after cleaning. : r/CleaningTips
![This is happening in 2 of the 4 toilets in my house of 35 years about ten days after I clean them. What is going on and how do I fix it? : r/Plumbing This is happening in 2 of the 4 toilets in my house of 35 years about ten days after I clean them. What is going on and how do I fix it? : r/Plumbing](https://preview.redd.it/this-is-happening-in-2-of-the-4-toilets-in-my-house-of-35-v0-e1ahblt1cphb1.jpg?auto=webp&s=8522516e62883ffe3e6a6d8096462028d4f6cf6b)
This is happening in 2 of the 4 toilets in my house of 35 years about ten days after I clean them. What is going on and how do I fix it? : r/Plumbing
![Weird spots appearing inside toilet bowl (within 1 week of cleaning, always the same pattern) : r/whatisthisthing Weird spots appearing inside toilet bowl (within 1 week of cleaning, always the same pattern) : r/whatisthisthing](https://external-preview.redd.it/KqX7E9cdYn5DK_p9mDaynee1KWQjOW50FN_jzy_9tTU.jpg?auto=webp&s=1ced6ab79c53f73e304f70c5cb3f6833645a88ed)