A steam humidifier will distill the CS out ,which is not the way to go.A cool mist ultrasonic,nebulizer type is what is needed. I have a weakness in my lungs which over-produces mucous.This can and did lead to a build-up in them.This led to Bronchial pneumonia and the inevitable ABX,with all the attendant problems. Using the above type humidifier with CS/EIS did stop that go 'round very successfully. I later learned that Fenugreek was very good at reducing the production of mucous.This was through finding that my situation was related to Cystic Fibrosis in which Fenugreek now plays a beneficial role. Since incorporating the herb,as a capsule, in my regimen,it has been a very long time since I've had to resort to the humidifier.
Harold