I have MAC and a modest case of bronchiectasis. I rarely, if ever, cough yet was started on the nebulized 3% saline and Aerobika 3 months ago at my request, hoping to be able to produce sputum for periodic testing to see if the antibiotics are working. I have not yet coughed up anything. I'm wondering if it's beneficial to continue with this practice anyway? Or is the Aerobika aerating my lungs to dislodge the MAC so the antibiotics can work better, even if I'm not producing sputum?