Calcium buildup in the toilet bowl is an unsightly and stubborn problem caused by hard water deposits over time—not fecal matter—and we think it's one of the most challenging cleaning tasks.

Unsightly toilet bowl stains and buildup turn your bathroom into a nightmare. But you can easily get the toilet shining again without any harmful chemicals.

There's no one-size-fits-all cause and solution to toilet bowl stains - different color stains mean different things, and each require specific removal methods.

The author of our guide to cleaning a toilet, staff writer James Austin, said that disinfectants are most effective when they’re not diluted by water in the toilet bowl.

Calcium buildup in the toilet bowl is an unsightly and stubborn problem caused by hard water deposits over time—not fecal matter—and we think it's one of the most challenging cleaning tasks.