There is a small percentage of tubs that have contaminants that are simply more stubborn than the rest. For this, we reccomend following these steps: 1.) Fill the tub over the jets with hot water. 2.) Add four ounces of Oh Yuk Jetted Tub Cleaner. 3.) Run the jets for 30 minutes. 4.) Turn off the jets, but do not drain the tub. 5.) Let the tub soak overnight. 6.) The next day, add 4 more ounces of Oh Yuk Jetted Tub Cleaner. 7.) Run the jets for 30 minutes. 8.) Drain the tub. 9.) Clean the scum ring with an all-purpose cleaner.
