How to use the nebuliser OneTwoThree Assemble clean dry equipment (face mask or mouthpiece, nebuliser bowl, tubing and nebuliser pump). Place pump on a firm flat surface. Ensure the two halves of the nebuliser bowl are connected. Fill the nebuliser bowl with the required amount of medicine. Connect the tubing and the mouthpiece or face mask to the nebuliser bowl. Put the facemask on or the mouthpiece in your mouth, and turn the machine on. Sit upright and breathe normally until the nebuliser starts to splutter and the amount of vapour coming out is minimal (usually 10 minutes). Switch the machine off when finished.