Our dishwasher does get hot enough to sterilize the neb parts; however, I don't run it every day -- maybe once or twice a week. So at noon I wash the nebs in hot soapy water, let them soak while I get the water boiling on the stove -- then I boil them for 10 minutes. I rinse in very hot water between boiling and set them on a paper towel on the counter -- I never put them in the sink to dry 'cuz they don't seem to dry off enough.