Thank you. I can use only 3% because my dr says 7% could cause a bronchospasm. When I asked her about the mucus plugs she had no advice for me. She said I don’t qualify for a vest yet (?) and the respiratory therapist will call me to make an appointment. He will show me how to do postural drainage. She said they don’t even do it any more because there are vests- easier probably. So I keep doing what we all do: mucinex, albuterol, sodium chloride and AD app and mucus plugs are still there. But thank you that you found time to respond to my concerns.