When it comes to cleaning a hot tub, there are two options that are usually available. The first option is to use a chemical cleaner, which is the most common way. The second option is to use a natural cleaner and some elbow grease. The chemical cleaners will eliminate any bacteria or algae in the water, but they can also leave behind an unpleasant smell and residue that can be hard to scrub off. Natural cleaners will not leave behind any kind of residue or smell, but they can be more time-consuming than using chemicals.