In the bellowing 3 cases please follow our maintenance instruction. Case A. If don’t use for a long time, please clean the machine after final use. Case B. Every one- two months clean one time. Case C. Before change to another flavor of the essential oil,
Cleaning steps as below: 1, Put the 95% alcohol into the empty bottle, 2, Set the strongest intensity, turn on the machine to work for 10-15 minutes, 3, Turn off it and finally pour away the alcohol.