I guess I'm lucky that I don't have a lot of sinus stuff - some, but not a lot. But now I know where to go for suggestions! All of these sound as if they have merit.
Has anybody tried Umcka? It's made out of a S. African pelargonium; local healers used it for all kinds of respiratory problems, and in Europe they have tested it and found it good. I used to be a victim of chronic bronchitis - every year, without fail, 2 or 3 weeks hacking my guts out. With Umcka, not. Which is why I got it into the local health food store where I used to work. After I started pushing it, I got a lot of comments like, "I had this cough for 6 weeks, and it went away!" "My kid has finally stopped wheezing after a month."
But while these conditions involve the sinuses, they're more about the lungs IMO. The lit on Umcka studies says that it's equally good for sinus stuff, but I haven't had a chance to test it. One of the things I especially like about it is, unlike OTC remedies, it doesn't make you all dopey (I'm like that naturally, thanks). And unlike anitbiotics, it doesn't throw your entire system into disorder.
I'm not a salesperson for Umcka by the way: I just think it's really great and more people should use it rather than crap that doesn't really work. But I don't know how effective it is for sinus stuff alone. It definitely dries up phlegm, that I can attest to. And seems to relieve inflammation as well.