I nebulize with 7% saline once a day and I try to walk every day. The weird thing is that about four times a day without doing anything I will start to cough up a good deal of mucus. Because of all those automatic events of airway clearance, I don’t do anything else. I have tried the Aerobika, but for some reason I can’t get anything up using it. It is all so random that I don’t like to go out anymore because I never know when it will happen and how disruptive I will be to others!