Bob, Make sure you're getting the CS into the sinus cavities.... put several drops of 10% ionic CS into the nostrils while the head is tilted back.... preferably while lying down with your head over the side of a bed... roll your head gently from side to side for 3-4 minutes. Do that two or three (or more) times daily and it should clear up just about any sinus infection. The key is getting to silver to make contact with the germs. The next thing I would do is get the heck out of that building!
Bob