Thank you so much for this web site. I found a great treatment for recurrent sinus infection. I emptied a little nasal spray bottle to put my own concoction. I filled it about 1/3 of the way with water-added about 1/8 tsp. salt, one drop of oil of oregano, and one drop of Apple Cider Vinegar. I spray this up my nose several times a day. In two days, my sinuses and cleared up!