If you forget that little something, that's ok too, I'll be happy knowing that I have improved the quality of your life. During my forty years of practicing Pharmacy, that knowledge was always more than half my pay. That's very well and good, but, if you have sinus problems you are probably not doing it correctly. When you have a runny nose, from whatever reason, be it from a cold, allergies, or sweeping out a dusty room, you blow your nose to clear your nasal passages of mucus. HERE is where the problem begins.
Most people close their mouths and blow too hard.
The enormous pressure actually forces much of the mucus into the sinus cavities where it doesn't belong. I can't emphasize this too strongly, most of you are suffering from chronic sinusitis because of incorrect blowing of your nose. You Are Doing It To Yourself.