One of the guys at Pharmaceutical Specialties (where I got my Eflow) explained to me how important it is to sterilize the nebulizer after each use. He said that tap water contains Pseudamonas bacteria. This means you could be breathing in bacteria if you rinse your equipment with water from the faucet. He recommended washing all the pieces including the aerosol head with warm soapy water (Joy dish washing liquid works well) then rinsing under the faucet. The important part is next, soaking all the pieces in alcohol for 5 minutes. Afterwards rinse with water that has been boiled. Let dry on a paper towel. Sometimes I just boil my equipment instead of soaking in alcohol, but I don't know if that is good for the equipment. Since I have been sterilizing it seems like I have had less infections. It does take more time cleaning everything. Does anyone else do this?