My mom used to clean my nebs in vinager, then I wash with Dawn and boil for 15 min. from 1997-2001, from 2001-2003 I washed them with soap and then put them in the microwave in a baby bottle steamer, from 2003-present I have been doing hydrogren peroxide (as one of the 3 CFF approved methods). Nebs sit submerged in Hydrogen Peroxide bath for 30 min. then are rinsed in sterile water. Sterile water can be created by boiling water for 15 min. My nebs are a lot cleaner - never plugged up and never any visible residue. Please consider that you might be reinfecting yourself with any other method than these three; peroxide, bleach, and alcohol. Also, never use a neb wet! It took me some convincing to make this expensive switch but it is well worth it because I actually get sick much less often. btw, I use Pari LC Plus.