I think recall is the single greatest thing LoL has innovated over Dota . <| sep |> No , it ' s not normal . It can be either some infection which keeps on chewing the sugars , but that ' s just one possibility . Here are some tips 1 Make sure fermentation stopped before you bottle . Just measure 34 days apart and check the gravity difference . 2 Leave some space in the bottles to hold the pressure . For a 500 ml bottle 35 cl is sufficient . 3 If you can , use fliptops . So , if such thing happens , you can just release some pressure and reclose them , saving the rest of the batch . But for sure , open a bottle , pour it out , measure its gravity , compare it to the bottling before priming sugar gravity . If the difference is huge , there ' s a chance for some infection , which is eating your remaining sugars . Also , taste it , look for offtastes .