I brewed AHS's aniversary oktoberfest. I bottled this stuff back 7 weeks ago. After about 4 weeks I had a few bottles and they were all carbed decently. Not huge head or anything, but some head and good carbonation throughout.
Now the last 4 I've tried ad absolutely no carbonation at all. A slight pffft can be heard when I pop the top, but I pour it straight down in the glass and get no head, and it tastes completely flat.
I should note that I brewed this 'moktoberfest' style. With a lager yeast, but at around 60 degrees. This was the temp throughout fermentation and bottle conditioning. I put the priming sugar mixture in the bottom of the bottling bucket, and siphoned the beer on top of it, as I had read to do. I did not stir it manually, but had read that the swirling from siphoning should do the trick.
At this point I'm about to start kegging, so I'm considering just dumping the remaining of this batch in a keg and force carbing it. Is this a good idea? I don't really like the prospect of drinking it all flat. Is there anything else I should/could try?