Hi Lisa! Introducing ice cubes or drinking water towards your oven can really help with crust progress (specially when baking sourdoughs!). Even though It's not absolutely needed, it will help create a wonderful loaf. Here's a little more info on the process: Baking bread with steam Joyful Baking! I Completely https://judo-sport50470.livebloggs.com/34379047/sourdough-cinnamon-rolls-fundamentals-explained