Gosh, I donno... though it may not lethal, do you think inhaling any form of Chlorine Dioxide is a good thing to do?
Also, have you ever tried nasal rinsing or irrigation?
I developed sinus infections following some very long Antibiotic treatments and I was able to treat them with a nasal rinse protocol. This involved using an extra strength Dristan mist to shrink the membrane(unclogging the passages) and then rising with a medicated formula twice a day. After 7 days, my infection was gone.
And though I contracted a few minor infections following this(brought on by colds etc), I was able to deal with them using a homemade saline solution in only a few rinses.