Have you ever used a Neti Pot? I use it all the time to clean out my sinuses. I actually heard about it from some of my former yoga students. The first time you try it, it is a little strange, but once you get used to it can feel like such a relief! It is a glass or plastic container, that kind of looks like something you would rub and a genie would pop out. You can get them at any local pharmacy in plastic or glass. The salt is sold in either packets or in a Ziplock bag and contains no preservatives. Sometimes I use it a few times a week, other times it can be a month before I use it again.