Mix baking soda and h2o until eventually it kinds a thick paste. Take off the paper towels, rub the paste in the stained parts using a fabric, then wait around 5-10 minutes. Spray the bowl down with vinegar to rinse it off.[6] X Research source In fact, the NHS says https://the-role-of-technology-in67368.blogpixi.com/29870928/a-secret-weapon-for-how-to-clean-the-toilets-of-your-restaurant