My most recent batch (2nd one) was a disaster at bottling time. It was completely turned
.
I let it sit in the primary for about 5 1/2 months before noticing that the airlock was drying up. Not completely dried up yet though. Filling it up again took a backburner to other things I was doing that day and a couple days later, noticed the airlock did not have enough liquid in it to prevent o2 from getting inside. O2 could've been exposed for a little less than half a day when I filled it up again.
Since I was bottling it in the coming weekend I didn't campden it or anything. In the bottling bucket I normally dissolve my campden with a little water. Did that and my normal bottling routine and tasted a sample. Very watery apple taste with a bitter aftertaste. Yuck! I could tell it was turning. I ended up with 23 bottles of it. Tried 1 a week later and it was even worse...
So, there ya have it. I ruined a 5 gallon batch in less than half a day after 5 1/2 months. Keep an eye on your airlocks folks, don't make my mistake...
Going for my 3rd batch of it tonight. Won't make the same mistake twice
.