I have had phlegm in my throat for years. Never being a smoker, so that was obviously not the problem. I would hack every morning, sometimes I would actually gag to the point of vomiting because of the phlegm up so high in my throat.
Until one day I saw this documentary on public tv. (tv ontario I think)
it was about a canadian male opera singer. In one segment of this program, while getting ready for his on stage performance.
He mentioned that he always ate an apple before every performance and muttered something like
"apples the best phlegm cutter there is"
now when ever I have a problem I drink apple juice it works for me.
I can't eat apples without peeling them. Apple-skin makes my throat itchy and I find it inconvenient peeling them.
But I think eating apples would work even better, because apple would likely not go down as quickly as juice would. (i don't know maybe maybe not:)