I wasn't sure where to post this, but I'm trying to get a starter going for potato flake sourdough starter and this isn't going well. It's watery and not bubbly at all. This is a recipe using yeast. I know the ones that don't use yeast can take longer. I am on day 4 now of it sitting out and have stirred each day and while it does have a very sour smell, there's no signs of life to it. Does anyone has a better recipe that maybe I can start over with? Or are all potato flake starters watery?