Human: What are the best ways to clean a bathtub? Assistant: 
The best way to clean a bathtub is to first remove any debris or soap scum from the surface. Then, use a mild detergent and warm water to scrub away any built-up dirt. Rinse the tub thoroughly with clean water and dry it off with a soft cloth. For tougher stains, you can use an enzymatic cleaner or baking soda paste. Finally, apply a protective coating of oil or vinegar to keep your bathtub looking new for longer.