@waldoj @tbridge things I learned about cider in my few efforts making it from neighborhood trees: 1) this is why we have crabapples, if you add around 10-20% crabapple juice to other sweet apple juice, it adds enough acidity to kill bacteria while the natural yeast on apple skin gets going. This is the natural way to make cider w/o a lot of sterilization. 2) always use a blow-off valve. Yeast produce CO2, and in a sealed vessel, it creates enormous pressure