Just FYI, @macjane & @duvie About 8 years ago when I received my first CPAP machine, I was instructed to use vinegar and water to sanitize my mask, hose, tank, etc. Ironically, on March 4th of this year, the day of your comment, I received a new CPAP machine, mask tubing, etc. because my other one had died. I was instructed that the newer masks and hoses are made of different materials than the older ones and that vinegar or dish soap are absolute No-No's. The current protocol is baby shampoo. I have to say the baby shampoo is a much more pleasant scent than the vinegar as the vinegar was always quite strong right after cleaning. I also use the SoClean2 and had on hand some of their neutralizing wash so I use that sometimes too. It has no odor at all. Hope this is of help to you!