I apologize if this has been asked before, but I am really struggling with this. I fear I have ruined two batches of kegged beer. I have started to use oxyclean to clean my kegs before filling them. (Prior I just used a water/scrub method and this had worked well, but I wanted to ensure I was getting everything.) I cannot pinpoint it yet, as I have done three kegs using Oxyclean--but I have two kegs that smell and taste like harsh chemicals. One (while still using oxyclean and rinsing twice) came out fine. The other one has had a couple of months in kegs and has mellowed out a bit, but doesnt taste quite right. The latest, is extremely offensive -- like to the point I cannot bring myself to consume it. Am I not rinsing well enough? Is it true that I should be using hot water to rinse oxyclean instead of cold water? Could it be something else, given that the one batch mellowed over time? I believe the next time I keg, I obviously will go back to my water+scrub methodology, but I fear that I have ruined 10 gallons.