I am about to give up on my sourdough baking escapades! I have a great starter and try to follow many different recipes and techniques, but I cannot get that firm soft dough that you all get. Mine remains sticky (I use 75% hydration) and I want big bubbles but it collapses on me as soon as I move it to bake it. See attached pic. Can anyone help me with a technique that will work for a home baker?