Hi.....
Have u ever tried the "Neti Pot" ? That would help ur sinus!!
Nasal sprays are poison, and will never fix your problem. Look into food allergies, cut out all dairy and gluten, see if that helps. Muccus problems are often related to "wrong" diet... Water with fresh squeezed lemon are good for clearing muccus, ..is your GI (gastrointestinal system) working properly, etc..
..forgot to say, nasal sprays used long term, will only make matters worse, and in fact damage your sinuses. If anything just use pure salt water sprays!