@lvnl Hello. It has been my experience that the Smart Vest has little effect on my sputum output. I would never encourage you to give up the saline nebulizing and aerobika as your tech suggested. I am amazed that a tech suggested that to you. I've had the smart vest for over a year and question if it does anything positive for me. If it does, I cannot discern what that is. I continue to use it maybe 3 times a week thinking perhaps it shakes the sputum off of my lung walls....but I am just taking a stab at that. I see absolutely no difference or benefit. On the other hand, the saline nebulization is invaluable. I've recently added the aerobika and I find that it also helps in bringing up mucus. The saline makes an inhospitable environment in your lung for MAC. Please never give that up. It is basic lung hygiene. Another technique that I have recently discovered that is very helpful for me and does not take a lot of time is autogenic drainage. Someone on this site posted an excellent video done by Dr Pamela McShane for airway clearance. If you go to segment 32:04-45:31 it gives an in depth description of how to do it. I have found it helps bring up a lot of gunk from my lung after I nebulize that I would never have been able to clear. Here is the video. The entire video is worthwhile if you have some time to view it. The more you know, the better you can fight this disease. Good luck....Kate Video at this link: