Has anyone tried nasal irrigation by means of a nemi pot or Navage device? If so, did it work for you, and have you continued with it? I have allergies and post-nasal drip, and wonder if one of these devices would be helpful. The Navage device runs close to $100 plus you have to use salt pods with it, so I would like to hear from some folks who've tried it to see if it would be a worthwhile experiment.- -Thanks!