The smell comes on, often, as a result of a cold or sinus infection. Some, not all, of these smells are caused by an
anaerobic bacteria thriving
in the upper sinuses, and I was able to remove mine with a Flip-Turn Sinus Flush, and other people have had success with it as well
http://www.medhelp.org/user_journals/show/2322
2. Some people had the smell, but were able to get rid of it with long-term antibiotics.
3.