Today I put my Aerobica and my nebulizer cup in my steam oven (I have another set if that got ruined) for 12 minutes at 212 degrees. The temperature is the oven's default temp for sterilizing. What I didn't expect is that the equipment was dry when I took it out. I think I will set the time a little longer next time. I have been boiling in distilled water after every treatment. Hopefully this will eliminate the need for the distilled water.