Our strongest nasal spray, Sinus Cleanser uses Manuka Honey MGO 600 to clean out nasal cavity microbes. Seasonal bugs generate moisture in the sinuses, creating a swampy breeding ground for microbes to form a biofilm. Once a biofilm forms, modern medicine believes that such a biofilm is irreversibly attached, in other words, impossible to detach. Sinus cleanser is effective at mechanically detaching a biofilm and flushing it from the sinuses. If tissues are raw or sensitive Sinus Cleanser may sting at first. It is normal to sneeze one to three times after each use. This is part of the cleansing effect, removing unwanted mucus and sinus junk caused by seasonal bugs.*