I'm like you, I have had a problem with the stuff for too long to remember and it is one of the things that drew me to OP. I also get an increase of flow during and after OP. I'm sooo hoping that this process will help me finally eliminate all of the congestion and PND that I have been experiencing. I haven't eaten dairy products for nearly 6 months, nor do I eat any wheat/gluten products. I don't often get colds anymore, but I have chronic sinus congestion/PND. I have tried using a neti pot, but oddly it never got the congestion out. The best it did was to push the cogestion from one nostril over to the other nostril. I have to admit, I gave it up rather quickly.
I would love to figure out the cause of this problem, but I will be happy if I just discover the cure for it.