I tracked Terry's post down. Missed it somehow before. I can't tell you why they said that. I just know when I talked to my respiratory therapist at Phoenix Children's Hospital where I'm treated for my A-typical cystic fibrosis several months back, it came up in conversation that I wasn't sterilizing my equipment every day because it was such a pain in the butt and I was sure to burn the house down forgetting to leave water boiling on the stove. She suggested the baby bottle sterilizer. The booklet for the Aerobika indicates that it can be disinfected by putting it in the microwave in a steam cleaning bag (i.e. Quick-Clean MicroSteam) following the manufacturer's instructions using distilled water. I don't use distilled water. I use the bags when traveling but have the larger bottle sterilizer for daily use. The nebulizer booklet that I have doesn't say it can or can't be sterilized in this manner. It does say to disinfect once a week by boiling parts in water w/2-3 drops of dishwashing liquid for 10 mins. I have a paper from my RT that outlines how to clean and disinfect respiratory equipment and it says to disinfect at least daily and gives 4 different options for doing that - one is to microwave in a microwavable bowl filled with water for 5 mins or Electric Steam Sterilizer (bottle sterilizer) for 6 - 8 mins. I've been sterilizing for 4 mins according to the instructions with the sterilizer. Now that I'm reading this sheet again, I'll up it to 6 mins and hope I don't melt anything. It sure is confusing and some instructions contradict others. I just do the best I can and pray that it's good enough. Hope that helps. Linda