I don't know where you got your info, but my paperwork says for Disinfecting, you CAN do either of those: boil or dishwasher:
"After cleaning the eflow nebulizer, place the plastic pieces (<b>exluding the aerosol head</b> - the metal piece) into a pan filled with distilled water and boil for 5 minutes
<b>OR</b>
After cleaning the eflow nebulizer, place the pieces (<b>exluding the aerosol head</b>) into a dishwasher basket. Place the dishwasher basket on the top rack of your clean empty dishwasher. Your nebulizer should be in the dishwasher for at least 30 minutes at a water temp of 158* (70*C) or higher, <b>without soap and without dishes</b>."
This is DIRECTLY from THEIR paperwork.
"After cleaning the eflow nebulizer, place the plastic pieces (<b>exluding the aerosol head</b> - the metal piece) into a pan filled with distilled water and boil for 5 minutes
<b>OR</b>
After cleaning the eflow nebulizer, place the pieces (<b>exluding the aerosol head</b>) into a dishwasher basket. Place the dishwasher basket on the top rack of your clean empty dishwasher. Your nebulizer should be in the dishwasher for at least 30 minutes at a water temp of 158* (70*C) or higher, <b>without soap and without dishes</b>."
This is DIRECTLY from THEIR paperwork.