I am brewing a batch of tej. This is the second batch I've brewed using the simple recipe of 3 parts water, one part honey and the gesho root. The first batch turned out great. For batch #2 I used the last remaining amount from my previous batch as a starter and then proceeded exactly how I did the last time. It bubbled almost immediately and has been bubbling and fermenting for about 3 weeks and today when I checked on it, it smelled strongly of vinegar. This is not the smell or taste of the other batch. I understand this can happen if you leave it too long but it hasn't been that long yet. Does anyone know why this would happen? Is there anything to be done to fix it? I'm so sad. I was looking forward to this since the first batch turned out so wonderful. Any suggestions would be great. Even if it's on what to avoid so this doesn't happen next time.