Found this interesting...

[Zane]

I tend to use water with colloidal silver as a form of mouthwash/gurgly thing whenever I feel any sort of bacterial infection acting up. Sometimes I'll use it to clean out my sinuses in general (through nasal application). It's a pretty well known trick. Just don't swallow the darn thing.

Based on advice from an MD.

I will give this a try as I have sinus issues.