Hi Everton, it's normal for your starter to rise to a high point as it ferments and then slowly fall back to its original height if it isn't replenished or fed. Falling isn't a sign that your starter has died, though it is a reminder that it needs to be fed. Has your starter returned to rising and bubbling, or are you still seeing no bubbles? While collapsing during the night wasn't necessarily a bad sign, no bubbles is. If you're still seeing no bubbling it may be time to start over. You may want to give our Baker's Hotline a call at 855-371-2253 so that we can help you troubleshoot more directly. Barb

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