Despite your best cleaning efforts, stubborn toilet marks keep returning—why? Papa Joe from “Papa Joe Knows” explains that it’s mold. The internal structure of your toilet allows mold to thrive in a cavity that gets sprayed with water every time you flush. This constant moisture helps the mold spread, causing those persistent marks.
To tackle mold at its source, lift your toilet tank lid and locate the overflow pipe. Pour vinegar—yes, the same kitchen vinegar—down the overflow. It will spread through the internal cavity and target mold with its natural acidity, effectively eliminating it.
