I can relate. I had really bad sinus problems and MCS a couple years ago. I tried salt water rinses and even hydrogen peroxide rinses, which only helped to a point. What helped the most, resolving the issue by about 70% was turbinate reduction surgery. Have you had a CT scan of your sinuses or an allergist examine the insides of your nose? This can help pin point the cause and/or determine if the turbinate reduction surgery is right for you.