The conversation between human and AI assistant.
How do I remove hard water stains from a toilet bowl?
Okay, how do I use them?
First, pour a cup of baking soda into the toilet bowl. Let it sit for a few minutes. Then, add a cup of vinegar to the bowl. It will fizz and bubble, which means that it is working. Let it sit for about 10 minutes. Finally, use a toilet brush to scrub the bowl and flush the toilet.