I recently bottled a few beers for a local competition using my counter pressure bottle filler. I had not problem filling the bottles and getting good carbonation. However my issue was with infected beer in the bottles. Is it possible to pick up something from the filler? After filling each bottle I placed the filler in s bucket of Star San. But what if I had some left over residue inside the beer in line from a previous filling several months ago that is now infected? How do you thoroughly clean a CP filler?