I agree with Trapper- I'd only use CS in my eyes if I made it myself.
The thing about CS burning the nose- Well, I have used a Neti pot, and using CS that way it might possibly burn, unless you added enough mild saline solution to it. But as simple nose drops with a dropper, CS has never burned me at all. I have used my own homemade 5ppm CS in eyes, ears, nose and as a throat spray, mouthwash and gargle (works great).