Before you throw away that strange-smelling jar on your counter, let's figure out what's actually happening with your sourdough starter.
Yes, sourdough starter can go bad. But many things that look or smell alarming are simply normal fermentation or signs that your starter needs feeding.
Sourdough starter is a living fermentation culture, so it isn't always going to look or smell exactly the same.
One of the most common reasons a starter suddenly looks or smells different is simply that it has gone too long without feeding.
A hungry starter may smell much stronger, become more acidic, develop liquid on top or become sluggish.
Don't judge your starter based on one characteristic alone.
Look at its overall condition and recent history:
Some changes deserve more attention than ordinary hunger or normal fermentation.
When in doubt, compare what you're seeing with reliable sourdough troubleshooting information rather than relying on a single symptom.
New bakers sometimes discard perfectly usable starter because it smells sour, has separated or looks less active than expected.
Understanding how starter works makes these changes much less scary.
Want to understand what's happening in your starter or troubleshoot something you're seeing? These five Academy resources are the best next steps.
Start your sourdough journey with a live, established sourdough culture and learn the simple rhythm of feeding, activating and baking.
Instead of wondering whether your homemade starter will ever become active, start with a culture that's already alive and ready to go.
Follow the activation instructions and if your starter doesn't activate, we'll make it right.
Zero Risk. Zero Guesswork. Just Real Sourdough.
Bake or Get Covered: If your starter fails to activate into a bubbly, active, bake-ready culture.
We’ll either send you a fresh replacement batch completely free or issue a 100% refund.
No hoops to jump through, no complicated returns, and no hard feelings.