Hi @annalaine I too have mild BE and have been diagnosed with MAC. Fortunately my sputum tests for the last year have come back at negative or 'few' for MAC. I do nebulize levalbuteral and 7% saline at least 5 days per week (Have an extra neb in my desk at work and do it while reading / answering morning emails.
I go to Mayo in FL for sputum tests. I live over an hour away so trying to keep a cup with me then get it to them is difficult. So when I go, I take my albuterol inhaler with me. and my Aerobika. I do my inhaler about 20 min before appt. Then during appt I nebulize with 10% saline. that will usually get me coughing. I sometimes take a break from neb and use aerobika for a bit, then back on neb with 10%. I may do a few huff coughs, if needed. I think taking a break helps because the saline is intended to draw water to your lungs to help thin out the mucus. For myself, I feel like that takes a bit of time. Hope this helps!