So, not to drag out an old thread, but I only had one bottle explode from this batch. That is until yesterday. After over a month with no issues, I had a bottle from the same batch explode again. I'm wondering if the heat inside the house may have been an issue, it got pretty warm yesterday. I bet the house got up to 80 degrees. Back to the bath tub for the rest of the batch so I can keep an eye on them.