Let is simmer. A very light bubble. I don't put the lid on very tight either. Add water ass needed. Good luck and enjoy.@Bromeo thread starter here I plan on cooking some in the morning is there anymore tips you can give? I was going to use your initial recipe as i have a slight tolerance..... I just wanted to make sure I understood you right the mason jar with the glycerin and bud level of water in the pan needs to match that and basically just sit the jar upright and let boil for 5hrs? Lid on? Thanks mate.