@lindakrenzel
Welcome to Mayo Connect and the Bronchiectasis group - we're here to share our experiences. That "stuck" thick mucus is a trial and we often are willing to try anything to get rid of it.
Let's talk about Naturva Lung Cleansing Spray - First, they offer no studies or other proof that this product helps other than a few testimonials. Next, inhaling substances into already challenged lungs can be a risky proposition. And with an unregulated product like this one, there is no guarantee of purity. Finally, there are other known, safer things you can inhale (nebulize) to help thin mucus - notably albuterol/levalbuterol to open airways and sterile saline to thin secretions.

Please read this before trying:
https://malwaretips.com/blogs/naturva-lung-cleansing-spray-exposed-scam-or-legit-investigation/
Are you doing nebulizing and daily airway clearance to get the mucus out? If Mucinex doesn't work for you, some people have good results with N Acetyl Cysteine (NAC).