I've got an unusual situation that I've not really seen described from anyone else. I have a Phillips DreamStation with a nose pillow and have used SoClean on and off for a few years. I'm diligent about cleaning my new parts as I install them, and wipe my nosepiece down before bed every night. I've always had that "smell" hours after treatment, but I do run the system for a while before bed and am pretty certain that any ozone gas has been neutralized or replaced. The residual material left behind is some sort of oxidation that I'm dealing with. I've noticed that at times when my humidifier is a little high and a drop of moisture drips into my nose, it will light my sinuses up like Hell's own fury (burns) and will wake me up. I also notice that where my nose touches the silicone or mask parts will also react and become inflamed, diagnosed as rosacea, but once I cease the ozone treatments, the condition clears up. My problem is not with the ozone but the residual material left behind from the process. I can't find anything on how to deal with this except for possibly bombarding it with extended ozone sessions, which I will try. Has anyone else experienced this?