Your heated humidifier:
Use only distilled or de-mineralized water. Change the water every night.
Clean mask cushion with soap and water. Rinse well.
Empty the water reservoir.
Wash the water reservoir, the seal, the tubing, the mask (separate the cushion from the shell) and the straps in hot/warm soapy water. Do NOT use antibacterial or hydrating soaps. Do NOT soak. RINSE WELL. Hang to dry. Take the water the reservoir, fill it with a solution of 1/3 vinegar and the rest with water, let it soak for 30 minutes. Rinse well.
Change the filter in the back of the machine every season (3-4months).
The mask cushion must be changed every 9-12 months.