"Reactive airways" means something in your lungs or brain is raising an alarm every time something irritating or unusual is sensed and your lungs respond. One of the responses in fighting "aliens" is that your lungs can produce more mucus.

One tactic for dealing with the mucus, beyond using your inhalers, is to intentionally cough it out. People with chronic lung disorders like Cystic Fibrosis or Bronchiectasis are taught a variety of active airway clearance techniques. Here is a demonstration on YouTube:

It is best done a few minutes after you use your inhalers, and only take a few minutes.

Has anyone suggested airway clearance to help with the mucus?
Sue