The sinus cavity is "UNIQUE" and like the clear fluid parts of the human body----the red blood cells can not reach the invaders and these microscopic parasites can enter and set up their colonies "literally" for the rest of your entire lifetime. These enemies will be "invisible' and just cause an over reactive nose the rest of your life---which results in partial breathing through the nose.
Christopher/shulze believed in "snorting" herbal powders up into the nose.
Medical actually has this tiny "purple" pill that can give you that will make your nose expel enormous amounts of snot, long 6 foot strings---but the drug is toxic and you can only get 1 small prescription and it does not cure the issue.
Some people end up having sinus surgery in an effort to restore full breathing and naturally that never works and just causes scar tissue.
With the mechanical sinus flush machines, in theory, you could soak the water in the same herbal powders, then strain and then pump that herbal water rhough your nose and somewhat follow what Christopher believed was the cure.