My daughter 24 with CF when she is in hospital has a massage therapist come in, her aunt is also one. At home we do chest pt and vest and my daughter kept advising she brings up more with the massage. I thought she was nuts but satrted doing more massage motion and sure enough it seems to work. Yesterday in the hospital the massage therapist did it and wow the stuff she coughd up and seemed clear after. Now I know my technique not same as massage therapist so my results not exactky same. My question is therapist uses a Lavender oil mixture , does Lavender have any properties that assist in airway clearance?