An automatic filling mechanism for use in conjunction with a hand-held fluid droplet appliance (10) for dental cleaning, the automatic filling mechanism having a door (42) to a chamber (40) in the hand held fluid droplet appliance (10) for holding fluid, the door having a female liquid inlet port (44) and a female liquid and air exit interface (46) having a snorkel system (80) attached thereto that is inserted into the chamber (40) that is used to fill the chamber (40) with fluid (112) from a reservoir (110) on a docking and charging station (100) when the hand held fluid droplet appliance (10) is inserted into a cradle (160) on the docking and charging station (100).
