Astroman have you tried lymph massage? I know it sounds weird, but it sure helped my sinuses.
Watch Heather explain it in this video -
/www.youtube.com/watch?v=QA-wi0d7-RoI sure benefited from this massage. However, on my first time I did the 50 times as she suggests and I coughed my head off and I felt really ill from moving too many toxins way too fast.
My second time doing it, I did 10 times for the tapping and 10 for the stroking. Much easier on me. Then I moved up to more and more times.
I love this one because you can do it at a stop sign. LOL