My Mac/Bronch specialist is 45 minutes from me. Two months ago when a sputum sample was needed just to confirm my absence of coughing was good news, dr suggested I deliver the sample I would collect at home to a hospital lab near me instead of driving all the way back to her lab. I had the sterile cup, the hazardous material bag to put it in. The morning I spit all that sputum into the cup, I followed all directions, had a big deep-from-my-lungs sample, delivered it, refrigerated, within the hour. I waited 6 weeks, knowing it can take 5 weeks for Mac to grow. Report came back sample bad, was not processed. Aaaaaarghhhh! So now this Friday I will deliver a new sample to my doctor’s lab. Question:: any advice on getting up a deep good sample? I nebulize 7% twice a day. If I skip nebbing night before might that help?