Hi Mike, if you've seen mold in your starter, it's a good idea to start anew. Use new containers and keep the starters in a different place in your kitchen. Be sure the starters are lightly covered (with a lid slightly ajar or plastic wrap) to prevent unfriendly bacteria from getting into them. You'll also want to feed your starters about every 12 hours (even in the early days) if you're keeping them at room temperature. If they're left to rest for longer than that, it may ferment too much and start to grow mold. We hope this helps get your sourdough starters back on track. Kye@KAF

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