How do I clean the reusable mouthpiece?

The reusable mouthpiece is cleaned weekly or in the event of visible contamination by gently agitating the mouthpiece in warm soapy water, followed by rinsing under clean, room temperature, running water without scrubbing, until no visible soap residue is left. Leave the mouthpiece to air-dry at room temperature by placing it upright on a lint-free cloth. The reusable mouthpiece must be replaced every three months and or if you have experienced a bacterial or viral infection.