It is my understanding....please correct me if I am wrong.....that the danger with teflon arises when the teflon is heated over 500 degrees, producing toxic fumes. I have eliminated all teflon that could "accidently" overheat. Like pots, tea kettles, crock pots, etc. But would the heating element in a humidifier cause such a risk? Just wondering as I am learning as I go.....