The starter is almost like water last few times I have used it. Each time I thought it would not do as it is supposed to but after over night to develop a sponge it was bubbly and had grown a little. I baked with it and had a good loaf of bread.
If I use 1 cup I replace with 1 cup of water and 1 cup of flour. Stir with a wooden spoon and let it sit on the counter for 24 hrs before I put it in the refrigerator for next use.