Phil
I have terrible excessive mucous too, and post nasal drip and feel like I have to clear my throat all the time. I was told after a 24 hour Impedance Study that I do not have reflux, no acid anyway. I guess Naso Pharyngeal Silent reflux can present a excess mucous. I have tried PPIs and they don't help.

Phil, do you clear your throat or cough? I also had a lung infection-mycobacterial- not sure if the mucous has to do with that, but does not seem like lung, seems like throat and nose. Would love to get rid of it.
Phil, I eat small meals, don't eat processed. Do you drink coffee? Alcohol? I have a cup a day and maybe a drink or 2 a week when we go out to dinner. Is your eating improving the mucous? Anything else that works?

Mine goes away mostly, when I sleep. Does yours? Do you ever get the mucous on an empty stomach. Sorry, lots of questions.