If you want to open up your sinuses or simply clean them out if you have been in a dusty or hostile environment use a heaping teaspoon of sea salt in a quart of water with about 1/4 teaspoon of baking powder. Also choice of water source should be considered. Well water works for me.
Tilt back your head and fill up each nostril one at a time. Do this once a day. The baking powder is supposed to keep viruses from developing since they apparently like an acidic environment. The proceedure is about as hazardous as taking a swim in the ocean and getting a snoot full of sea water.
Of course this can not be medical advice since I don't have a license to practice same. I have heard of no instances of drowning as a result of performing this act but to be on the safe side I would recommend having a good friend on hand to perform mouth to mouth if things turn out badly
