I used this recipe https://www.homebrewtalk.com/f32/caramel-apple-hard-cider-292770/ but with brown sugar instead of Dextrose. Bottled them in swing top bottles and one soda bottle to check carb level the soda bottle is almost at soda bottle hardness. But when I pour one of the ciders it fizzes for about 10 seconds and then is flat. The swing tops make a loud poping sound when opened so im assuming there holding pressor not sure whats going on.