@lvnl thank you for your reply, I think what makes a huge difference is the location of the mucus in your lungs. Mine is both lower lobes (posterior) and middle right lobe. As the airway branches get lower into the lungs they get smaller I believe, therefore it makes sense to me that it would be more compacted in a smaller space thus making it harder to sheer off and get into the larger more central airways to expel. Make sense? I have better luck with Autogenic drainage and Areobika. I don’t think anyone will really have an answer, as to why 2-3 weeks. Anyway I truly wish you the best on this BE journey we all know how hard it is to cope with this disease. God bless and Best wishes.