Black Residue in Bathtub [5 Easy Ways to Eliminate Stubborn Stains]
Black residue in the bathtub is typically caused by the buildup of dirt, soap scum, minerals, or mold. It can be removed using vinegar, baking soda, or a commercial cleaner specifically designed for bathroom surfaces. Keep reading to learn more about the causes of black residue in the bathtub and how to effectively remove it….