How do you get water rings out of a toilet bowl?

To remove water rings from a toilet bowl, you can use a combination of baking soda and vinegar. Pour about a cup of baking soda and a cup of vinegar into the bowl, letting the mixture fizz for a few minutes. Scrub the stains with a toilet brush, focusing on the ring, and then flush to rinse. For tougher stains, you may need to repeat the process or use a pumice stone gently on the affected area.