SoClean cleans CPAP equipment by pumping ozone gas through your mask, hose, and humidifier chamber to kill bacteria and other pathogens. You place your CPAP mask inside the SoClean unit, close the lid, and the device runs an automated cycle that fills the entire CPAP circuit with ozone. No water, no scrubbing, no disassembly required. But the convenience comes with real trade-offs, including FDA concerns and warranty issues that are worth understanding before you invest.
The Ozone Cleaning Cycle
When you turn on a SoClean (or its timer activates), the device generates ozone, a reactive form of oxygen with three atoms instead of the usual two. SoClean markets this as “activated oxygen.” The ozone travels through a small tube connected to your CPAP, flows into the mask inside the sealed chamber, then continues through the hose and into the CPAP’s humidifier tank. As the gas contacts surfaces, it destroys bacteria, mold, and viruses by breaking apart their cell walls.
A typical cleaning cycle runs for a few minutes, followed by a resting period meant to let the ozone break back down into regular oxygen before you use your CPAP that night. The manufacturer recommends waiting a set period after cleaning before wearing your mask. The entire process is hands-off once you’ve placed the mask in the chamber and closed the lid.
Setting Up the Device
SoClean connects to your CPAP setup through an adapter that sits between the hose and the machine. The adapter allows ozone to flow from the SoClean unit through your CPAP circuit without requiring you to detach anything each night. You place your mask inside the SoClean’s sealed chamber (still attached to the hose), close the lid, and the device does the rest. Different CPAP mask styles require different adapters, so you need the right one for your specific setup.
The device contains a filter and check valve that need replacing every six months. The check valve prevents ozone from flowing backward, and the filter captures particles. The SoClean display prompts you when it’s time for a replacement.
FDA Warnings and Recall History
The FDA has never cleared or approved SoClean, or any ozone-based cleaner, for use with CPAP devices. This is a significant detail that often surprises buyers. The agency issued safety communications questioning the effectiveness and safety of ozone and UV-based CPAP cleaners, noting it had received reports from 2017 to 2019 of patients experiencing coughing, difficulty breathing, nasal irritation, headaches, and asthma attacks after using ozone-based products.
Independent testing found that these devices generated ambient ozone levels above limits considered safe for human exposure. More concerning, ozone levels remained high inside CPAP machines and tubing even after waiting the manufacturer’s recommended time after a cleaning cycle. That means residual ozone could still be present when you put on your mask to sleep. For people with existing respiratory conditions (which includes most CPAP users), exposure to elevated ozone can worsen symptoms or increase infection risk.
SoClean has since issued a voluntary recall of its SoClean 2 and SoClean 3 devices. The FDA’s safety communication specifically addresses equipment “intended for use with CPAP devices and accessories.”
Effects on CPAP Equipment
Ozone is a powerful oxidizer, and that reactivity doesn’t stop at bacteria. ResMed, one of the largest CPAP manufacturers, observed that prolonged and repeated use of ozone devices can cause internal damage to its machines. Effective February 2020, ResMed’s limited warranty excludes damage caused by ozone device use. If your machine develops problems and ResMed determines ozone exposure contributed, the warranty won’t cover it.
The concern extends to materials inside CPAP machines. The FDA’s investigation into recalled Philips CPAP devices found that the breakdown of sound-dampening foam inside those machines could be worsened by using ozone cleaners. While that recall involved a specific Philips manufacturing issue, it highlighted how ozone interacts with the rubber, silicone, and foam components inside CPAP equipment in ways manufacturers did not design for. Silicone mask cushions and rubber gaskets can degrade faster with regular ozone exposure, potentially shortening the life of parts you need to replace out of pocket.
How It Compares to Manual Cleaning
Most CPAP manufacturers recommend simple daily cleaning: wiping down your mask cushion with a damp cloth or mild soap, rinsing the humidifier chamber, and letting everything air dry. Weekly, you wash the hose and mask more thoroughly with warm soapy water. It takes about five minutes for the daily routine and maybe 15 minutes weekly.
SoClean’s appeal is eliminating that routine. But given the FDA’s position that no ozone cleaner has demonstrated it effectively sanitizes CPAP equipment to a standard the agency recognizes, the convenience may not deliver the protection users expect. Soap and water physically remove oils, dead skin, and residue that ozone gas simply passes over. Ozone can kill microorganisms on contact, but it doesn’t clean in the mechanical sense of removing buildup from surfaces.
If you’re considering a SoClean primarily because keeping up with manual cleaning feels like a chore, it’s worth knowing that the basic soap-and-water method remains the only approach CPAP manufacturers and the FDA currently stand behind.