In my quest to find faster, but unequivocally effective sterilizing, I have tried every method on here. I bought the Germ Guardian recently. It gave off an awful smell(perhaps new plastic being heated), the nebulizers weren't completely dry, and I couldn't tell if it reached a hot enough temperature. The insert with the Germ Guardian says in bold letters, "Do not put anything wet in Germ Guardian." Must be a reason.
Someone on this site, said that if you ARE putting nebs in wet, the GG will not reach the required temperature for sterilizing. I guess you need to put a thermometer in to see. Easy enough.
Actually I just wanted to use it to dry nebs, not for sterilizing. With the smell and my GG not getting the nebs completely dry, I was done.
I use all the CFF approved methods at different times. Control III, boiling in water is difficult because of hard water (I'm not lugging distilled water around), but steaming in the baby bottle sterilizer is my fave. Thanks Just One More for posting the times. I always do it for 15 minutes, but I was never really sure, so I used Control III also -- which takes too long because of the sterile water rinse.
Many years ago, I was on vacation and cheated on sterilizing. I ended up in the hospital for weeks while on that vacation. So I take no chances.