Cast iron is a great choice for a bathtub because it is durable and easy to clean. Here are some tips on how to clean a cast iron bathtub:

  1. Pour a pot of boiling water onto the bottom of the bathtub and then add soap. Soap will help to remove any dirt, grease, and other debris that may have built up on the surface of the bathtub.
  2. Use a scrubber or brush to scrub the entire surface of the tub with soap and water. Be sure to work in all directions so that all of the dirt, grease, and other debris are removed.
  3. Rinse off any excess soap with cold water and then dry off the cast iron bathtub using a towel or air-drying rack.