Originally Posted by BBL_Brewer
One other thing. You mentioned that the keg had syrup residue in it. Did you replace the o-rings? The rubber o-rings will retain that soda smell even after you clean it up good. This can contribute off flavors as well.
From Cornykeg.com: "All Converted CornyKeg ball lock kegs have been washed, rinsed, pressure checked, all o-rings have been replaced and the pin lock fittings are replaced with the new CornyKeg ball lock fitting."
I assumed the residue was soda that had come out of suspension, as I had gotten the keg about 2 months before I used it, and never opened it up....although I would have thought the wash and rinse they did would take care of any residue whatsoever.