A little bit of starter can eat a lot of flour and water.
A little bit of starter can eat a lot of flour and water. Once you feed it, reseal the jar, but leave the starter with some access to air — I leave mine with the lid on it but not screwed tightly. Some folks cover it with cloth. Whatever works for you. If you're baking frequently, feed it once or twice a day and leave it out at room temperature to keep it active. For less frequent baking, feed your starter just once a week and keep it in the fridge.