The FDA wants to make consumers and health care providers aware that, to date, the FDA has not authorized for market any products using ozone gas or ultraviolet (UV) light to clean, disinfect, or sanitize continuous positive airway pressure (CPAP) devices and accessories.

http://www.fda.gov/medical-devices/safety-communications/potential-risks-associated-use-ozone-and-ultraviolet-uv-light-products-cleaning-cpap-machines-and