The “Double Tap” will make sure there is no left over residue after one leaves the facility. For, this will be the one toilet that makes sure everything smells nice and clean. Yes, you flush it once but the double tap will flush it again making sure nothing else in the air survives. The 2nd tap provides an incredible shot of a powerful beautiful smell and cleanser to make people believe flowers came out of your derriere. Double Tap because life is too short not to smell the roses even in a bathroom.