Hi Laura, we'd need a little more information about your starter and how you've been maintaining it in order to predict whether one feeding would be enough to bring it back, but chances are a few days of feeding your starter twice a day at room temperature (about 12 hours apart) will bring your starter back to its normally bubbly self.
Barb
August 6, 2018 at 5:24pm
In reply to I’ve lost the bubbly goodness of my starter. It is flat. Will t… by Laura (not verified)