My first two bottles I set aside for observation and testing. The way I look at it, you can clean the equipment, but there is going to be residue inside the hoses, racking cane, bottle filler, etc. etc. To me, the first two bottles are experimental. Maybe that's what happen to you. Also, there is that last bottle that doesn't quite fill up all the way and has a lot of head space, to much O2, maybe you got that one.