My father's 10+ year sinus problem was cured simply by taking plenty of vitamin C taken for 2-3 months The dose I prefer is between 1000-3000 mg /day taken for about a month period. It is important that to clear some mucus, by liquifying them, taking 500 mg of N Acetyl Cysteine a day. Taking some vitamin A, weekly dose and vitamin E twice weekly may help too, one is to control the mucus, the other is to raise the antioxidant to protect the body against weakened immunity. The other, is to stay away from carpets, they are source of fungus. If carpet is to be cleaned or disinfected, spraying with borax solution and hydrogen peroxide helps. But you have great method,thanks