I had to use a towel and a lot of force to get my old kombucha bottles open after a few days of F2. For one of them I even had to use a wrench! I just couldn't get it open otherwise. I think it's because of the amount of carbonation, because even when I got it to move a little bit with the wrench, I still couldn't get it open with my hands, there was just too much pressure. Anyone else have this experience and a solution maybe? I would like to keep using my old kombucha bottles.