I will point out that this question, how to sterilize nebulizer parts, comes up a lot. Please consider which nebulizer you use. My new Innospire Go has instructions which specifically say not to use these techniques. I am supposed to boil for 10 minutes once a week in a pan of water, making sure the mouthpiece does not touch the bottom of the pan. I use a silicone "waffle" hot pad in the pot. I thought long and hard before spending so much money (not covered by Medicare or my insurance.) I sure wouldn't want to ruin it by not following directions!
PS I do not boil the water first, or use spring or distilled water, since the 10 minute boil will kill any bacteria.

Sue

@ljfoo good to have Dr Falkenham test for us, looking forward to hearing what he says.