Clean Tubs with Jets. Fill the tub with very hot water, or that which reaches at least 140 degrees Fahrenheit. Add 1/2 cup of mild dish soap and up to 4 cups of bleach for a heavily soiled tub; add 2 cups of bleach to a slightly dirty tub. Run the jets for 20 minutes.Drain the tub.Fill it again with lukewarm water only.lear the tub of any soap, soap caddies and bottles and set them aside. Rinse the tub with warm water and a sponge. Mix 1/2 cup of bleach in 1 gallon of water in a bucket. Wipe the tub with the solution and let it sit for at least five minutes. Rinse the tub with cool water and wipe it dry with a towel.