I too have been flushing for years and have not had a sinus infection since. I carry a sinus flush kit with me to the boat that I bought over the counter at the local drug store that I take to work. My sinuses started burning this last trip and I started flushing... on day 2 the burning stopped and so did the sneezing I was doing.

I highly recommend flushing with either a Nedi pot or one of those kits like I got. (The kits even have the mix to put in the water in pre-measured packs.)

I had a sinus infection every single March for years until I discovered flushing them myself... the doctors do it and charge you big bucks and you can do it yourself!