I have had the same experience! I was trying to do Airway clearance + Aerobika before drinking coffee each morning to avoid the GERD factor but a) I found I was too tired for that! b) I have also found that the caffeine from one cup of coffee does something to loosen mucus (whether it's stuck in my throat or what I can't say) but I am able to cough some stuff up without doing anything so I'm going with it! 🙂