In the past two months, I have had three white mask connector tubes degrade and break. I am certain it is from the ozone produced by the SoClean machine. The cost of replacement is expensive. I found out that SoClean damages silicone, plastics, and rubber. I guess I need to manually clean my CPAP tubing from now on. Furthermore SoClean admits that their machines can damage the motor in ResMed Airsense 10 machines. Too late. I'm not eligible for a new CPAP machine until next year. User's recommendation: Think twice before you purchase a SoClean. Hand-washing is till the best.