I have sinus problems. Doubled up on my humidifiers (ultrasonic) this last few weeks. Seems to help a lot. 58% humidity in the sleeping area. My weather station says it is 26% humidity outside. Nasal irrigation deems to help, I use a Water Pik with Grossan nasal irrigator. Distilled water with Neilmed saline packet and budesonide. I also use Dupixent injections twice a month. Cheap easy help is a nasal inhaler containing saline. I have been eating tylenol and ibuprofen like candy this year, plus twelve ER visits. The forest fire smoke is not helping this condition.
Link below has scientific data and a picture of mucosal cilia. I believe if the mucous flow stops then the problems begin.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3906518/