Jennifer, sourdough doesn't need an extremely warm environment; 70 degrees is usually a good temperature for the starter, and around 76°F is a good dough temperature to aim for. Your method sounds great! If you boil water in the microwave be sure to insert a wooden spoon or heat resistant plastic spatula in with the cup of water. This breaks the surface tension and helps prevent the boiling water from suddenly exploding upward. Barb@KAF

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