Seriously, sirhooter, I've had a phlegm problem for about 2 mo. now.   (Not sure what "sounding sinusy" means, but I don't think I have that.)

When I start to sing -- even if I've warmed up for 10 min or so beforehand -- I sound like I'm gargling, for about the first 10 min of singing. But I seem to "work it out" by the time I've sung 2 to 4 songs.

There's a formerly prescription, now OTC med called "guiafenicine" (sp?) that loosens phlegm in the throat so you cann cough it up easily. My doc has recommended using that on a regular (daily or bi-daily) basis, instead of PRN, until this problem goes away.   Guiafenacine (sp?) doesn't seem to have side effects (won't make you drowsy or speed up your heart, e.g.) and really does help get rid of phlegm.

The other alternative, in my case, anyway, is just to warm up longer, to make sure I've got the phlegm loose before I start a performance. Lots of water helps too.

Genie