Hi Healthybon! I agree the saline was a huge game changer for me...everyone is different. I had no trouble at all with the 7%. My MAC and bronchiectasis have improved on imaging and all symptoms. Some areas even resolved. I do also take a lot of supplements, exercise, eat clean, do red light therapy and dry sauna regularly... so I think you have to keep trying different things and this forum is a WONDERFUL resource! All of these things have helped me improve and stay healthy. The saline really works for the airway clearance! Good luck!! Blessings!