I don't need Grapefruit-Seed-Extract if I just use salt water...for me it does the trick. It didn't though, when I was REALLY congested. I say do the cleansing b/c that gets rid of the underlying problems. Sinus infection is really just a symptom.
Keep on with those liver cleanses. I've done about 11 or 12 of them over a couple of years. That got rid of my allergies.
I still have bloating and fatigue (during PMS), but I'm doing a P&B cleanse right now to get back in game. I've been quite undisciplined in recent days and I feel it!