How do you remove lime b buildup in toilets?

To remove lime buildup in toilets, you can use a mixture of vinegar and baking soda. Pour about 2 cups of vinegar into the toilet bowl, followed by 1 cup of baking soda. Let the mixture sit for at least 30 minutes to break down the deposits, then scrub with a toilet brush and flush. For tougher stains, you may need to repeat the process or use a commercial descaler specifically designed for hard water stains.