How do you revive a sourdough starter that seems dead?
A starter is almost impossible to kill, it usually just looks dead. Hooch on top or no rise means it is hungry, not gone. Stir everything back in, take a spoonful and feed it 1 part starter, 5 parts flour, 5 parts water. Freshly milled flour also ferments extra fast, so it may simply need more frequent feedings.
Answered by Hendrik, The Bread Code
From the book
To get started prepare your sourdough starter. If it has not been used for a very long time, consider giving it another feed. To do so, simply take 1 g of your existing sourdough starter and feed it with 5 g of flour and 5 g of water. If you do this in the morning, your sourdough starter will be ready in the evening. The warmer it is, the sooner it will be ready, consider using warm water if it is very cold where you live.
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