Effective Natural Remedies for Managing Sinus Polyps

I have had polyps for years, however they have been agitated recently because of the cold or some other factor I am unaware of. Two months I had intermittent infection because the polyps caused a post nasal drip. I went to three different doctors and finally got the steroid nasal spray. The spray was good for a week. However, my post nasal drip became worse. Tried vitamins, anti histamine etc.. I came across a home remedy website and tried ginger tea. I also tried breathing more with my nose. My polyps are there but have shrunk. I drink at least 2 cups a day with deep breaths from my nose. This technique didn't cure my polyps but made it more tolerable.