The best thing to put in a jetted tub is a body wash and shampoo. A body wash will help remove dirt, sweat, and oils from your skin while the shampoo will cleanse and condition your hair. If you want to use jets, they are great for people with medium to large hair because they distribute the water evenly. However, it is hard to keep a jetted tub clean and it can take some time to get all of the wastewater out.