I just bought an ACA, and it's very simple when I use it. Mine is a liter of 15W. Every time I use yogurt substitute as a primer, I put about one-third of yogurt at a time, add three generations of pure milk, and put it in a container. It will take about 4-8 hours, but when I do it, I must pay attention to: I must first boil the container with boiling water for one minute! If the room temperature is low, you can add some water between the machine and the container, which is about 40 degrees. If you start to have a bad grasp of the time, you can open it in about 6 hours, as long as it forms a block and looks like a tofu brain! It's better to refrigerate it after it's done! Add some sugar when eating, and you can also add fruit. It's delicious. My children especially like it. Call it yogurt ice cream!

If you can't do it well, it has something to do with the time and proportion of fermentation. You can do it several times!

As you said, the situation is still short. I did it at first. According to the instructions, it took four hours, but the result was not good at all. If the room temperature is low, you can add some water between the machine and the container. This is very important. I will do it now. My hair is very good, just like tofu brain, and it is thick! Also, is the ratio right?