I joined a facebook group called Lung Matters: covid, bronchiectasis, mac, NTM… and the woman who started the group developed a guide that includes airway clearance techniques. One of the things she does is a final lung clearance at the end of the day, which I’ve tried and it’s helpful in getting out any sputum left in your airways that might interfere with sleep. You’re still coughing up goop but at least (for me, anyway) it feels more deliberate and you don’t have to dread the coughing when you go to bed. It’s a good manual and worth the read.