This is what I have been doing for myself and do believe it is helping.
You may already know or do some of what I will post here but just in case you don't or haven't tried these, I will explain what I do for myself.
I have had improvement per the C Scan in the upper lung area with less inflammation. I apparently need to work harder in the lower lung area...a new showing.
I wear an N95 Mask out all the time in public and have found that with breathing in my own air/moisture, I believe that is what is doing it, I more often than not have to clear out what has apparently come up from my lungs immediately after removing the mask before getting back into the car. Sometimes I wear it for a short time while I exercise before doing airway clearance methods.
I boil water in the morning, I prefer that to a humidifier for sanitary reasons, and believe the moisture that it puts in the house has also helped. I prefer to keep the lid on the pot until the water has boiled for 15 minutes.
I live in a cold winter climate and keep my heat lower in the house, for me 67 degrees, and layer myself with clothing items if I get cold in that temperature. Forced air heating of the house draws out moisture so keeping the temperature low helps keep some moisture in the house.
In the summer with the heat I keep the temperature high, 79 degrees. Air conditioning draws out moisture from the house. Summer dress code for me is the opposite of winter.

Should others who read this have any thoughts, good or bad, or suggestions about what I am doing please let me, us, know your thoughts, all is appreciated.
Barbara