Hi Jennifer,
Nebulizing is a form of airway clearance because doing it with the 7% hypertonic saline causes me to cough up mucus. And, I consider any form of mucus expulsion to be airway clearance. Along with nebulizing, I use an airway clearance device called Aerobika. You may already be familiar with it. But, just in case you are not, here is information:
https://www.mountsinai.org/files/MSHealth/Assets/HS/Locations/Respiratory-Institute/Using-the-Aerobika.pdf
I use a Pari LC sprint nebulizer. I connect my Aerobika to it and am able use my nebulizer and Aerobika simultaneously. I love this because it saves time and is a very effective way to do airway clearance. Here is a youtube that will explain: https://youtu.be/XKBd_hJVsik?si=5usOHTKwc1OW47RZ

Last but not least, here is a very informative site that was kindly given to me by another well-informed group member. It explains airway clearance devices and techniques:
https://bronchiectasis.com.au/resources/airway-clearance-videos
I am so glad you have found this group. I was clueless when I first was diagnosed with MAC and BE. This group is worth it's weight in gold as I have learned an incredible amount from its members.

I hope this helps shed light on a challenging topic. Best of luck to you. I am sending healing vibes your way!
Arlo