Pouring vinegar into a toilet bowl or spraying the vinegar onto stains in the toilet can help remove stains. Adding baking soda to the vinegar is also effective for removing stains from toilet bowls.
Pouring 3 cups of vinegar into a toilet bowl before scrubbing the stains with a toilet brush is an effective stain-removing method. Pouring the vinegar into a spray bottle, draining the water from the toilet, and spraying the stains with vinegar is also effective. Combining a cup of vinegar with a cup of baking soda creates a fizzing reaction in the toilet, which helps to loosen stains. Allow the mixture to fizz for at least 10 minutes before using a toilet brush to scrub the toilet.