To treat the components of the nebulizer you may use Decasan® solution marketed in vials. It should be dissolved as 1 part Decasan® to 3 parts water. You should dip the components to this solution for 20-30 minutes.
Decasan® is a wide spectrum antiseptic agent, one of the most advanced SAS. It is widely used for wound and cavity treatment by professionals: surgeons, ear-nose-throat doctors, traumatologists, and many others.