One thing to carry with you now that you are about to fix the warmth problem: these build serious pressure, and glass bottles do burst. The failure mode flips from flat to dangerous quite quickly once the conditions are right.
So pressure-rated bottles, burp or squeeze-test daily, and the moment it is fizzy move the lot to the fridge, which slows everything down enormously. Open over a sink and pointed away from your face. The flat batch is the safe mistake; the next one is the other kind.