I huff cough lying on my back and roll to my side to spit out the mucus and then while on my side Huff cough some more to spit out more mucus before lying down again starting the process over. I do this for 9 minutes. I'm trying to find a respiratory therapist to tell me if I'm doing it right so I don't straighten my diaphragm and lower back but I am having a very hard time finding such a therapist.