Does sourdough starter go bad?
Can you keep sourdough starter forever?
How long can you leave sourdough starter without feeding?
How old is the oldest sourdough starter?
How do you revive an old sourdough starter?
How long can sourdough starter stay at room temp?
You can really only let it sit for a day or two without feeding before you start to run into problems. In our opinion, the only reason to keep a starter on the counter is if you bake every day. We have found no difference in activity and flavor between counter and fridge storage.