I really really think you should be cleaning it after every use- medicine, oil, whatever. I would never even consider reusing a neb, even if it was for the same medicine. Anything you put in your body should be sterile. This is totally different from being a germ-a-phobe, it is just common sense. Bacteria feeds off of condensation and moisture, especially when it is just sitting there all day.
Caitlin
Caitlin