@loveblue Yee gads! If we are not crazy yet, this will end that journey! The only thing that is for certain is ... that nothing is for certain. I have been microwaving the aerobika and baby bottle sterilizing the nebulizers once a week in addition to daily cleaning. Sounds like you sterilize daily -- is that correct? I can't imagine that doing it either way for all the equipment is inadequate. As far as the vinegar is concerned, NJ therapist said that once/month in vinegar is helpful to remove any buildup. I do the 2 cups vinegar to 2 cups distilled water so that I can soak all equipment at same time. If anyone else has a thought on this, it would be greatly appreciated. Terry