I've had a chronic sinus problem for about
a year and a half. Recently my allergist had me on Bactrim, then changed me to Diflucan, which seems to be working even better. She says sinus problems are often caused by yeast and mold.
I also rinse with my own mix of water, salt and baby shampoo: 500 ml/1 tsp/1 tsp. I don't ahve a "netti" pot, but my smallest teapot does the same job.
My allergist also has me rinsing twice a day with Bactroban nasal ointment in 15 ml saline from a spray bottle which is then microwaved about
15 - 30 sec to heat it up and melt the prarafin. The parafin sticks to the side of the glass cup I melt it in and I pour the rest back into the spray bottle.
Interesting regimen. Seems to be working.