Considering I understand what you have said above, my thoughts are: Have you had bouts with MAC infection(s) that your doctor(s) said required treatment? How long have you had Bronchiectasis? Have you been on the antibiotics for infections with BE?
I am boiling purified water to drink, however due to being away from my home this week I am not boiling it, hoping it will not prove to have been a negative for me.
I also just wash/rinse in the cold tap water due to all I have read that Dr. Falkingham has said and written. I also mask outside the house and sometimes when others are in my home with me.
Yes, keeping the lungs healthy with exercise and airway clearance techniques makes a big difference. Hope I will always be well enough and physically capable of keeping up with all we need to do.
Barbara