1. If there is only a little dust or something on it, just use warm water to add detergent and scrub the barrel gently with a soft brush, and it will be clean.
2. If there is a lot of water rust on it, buy a bottle of white vinegar and clean it with white vinegar, there will be unexpected surprises.
3. For those stains that are difficult to clean, if you are afraid that it will affect the beauty, you can put them in the kitchen as a household trash can.https://www.fhpails.com/