well the thing that frustrates me is, Ive been using the same stuff in the exact same way for 8 months without this problem. I even used 15 gallons of the drum before it started bubbling like crazy. So i think something happened moreso than just bad plastic or cheap plastic, it is cheaper plastic but I didnt have these problems like this when heating slowly in a pot. thanks
Ive actually been quite pleased with the plastic last 8 months