First Starter Attempt
So a little over a week ago I tried making my first starter... It seemed to be going fairly well, it probably doubled in size within the first hour, before deflating. However, since that first day, I haven't seen it rise at all. It has developed a sour, beer-like scent, but as I said it has remained at roughly the same level. At first, I assumed it would simply take more time, as I'm just keeping it at room temperature, but now I'm thinking I may have made a mistake. Any ideas as to how I may have messed up?