Hi Ling,
I was diagnosed with bronchiectasis & MAC five yrs. ago. Fortunately I have remained well which I attribute mostly to masking, exercising & using my Pari nebulizer. My pulmonologist initially prescribed 3% sodium chloride, but I requested 7% after reading about it here. It irritated my throat so I mixed it with my leftover 3% & after a month or so, I was able to use it without any problem. I also believe it stopped my hemoptysis which had become a regular occurrence.
I hope you also have good results from airway clearance methods! Take care, Linda