By chance, I had the same problem as you, once again, last week, after a bout of
flu, including the loss of voice
. For research purposes, I got a neti pot to see if it would work as well as The Sinus Flush. It provided some relief, but seemed to do a half-a*sed job, or more precisely, a half-sinus job, not reaching the upper part of my sinuses where my infection was. Of course, results may vary.