Every Baker Hits a Snag — Here's How to Work Through It
Sourdough is one of baking's great joys — and occasional frustrations. Even experienced bakers encounter starters that go quiet, smell strange, or develop mysterious layers. This comprehensive troubleshooting guide is designed to help you diagnose and solve the most common sourdough starter problems with confidence.
For additional support, our Troubleshooting Feeding page covers feeding-specific issues in detail.
Problem: Liquid Layer on Top of My Starter
What it is: This liquid is called "hooch" — it's a mix of water and alcohol produced by over-fermented starter.
What it means: Your starter is hungry. It has consumed all available food and is producing alcohol as a byproduct.
Fix: Pour off or stir in the hooch, then feed your starter. If this happens frequently, feed more often or use a larger ratio (like 1:2:2 or 1:5:5) to give it more food.
Problem: My Starter Smells Like Nail Polish Remover
What it means: This is acetone — a byproduct of over-fermentation, same cause as hooch.
Fix: Feed immediately. The smell should improve within one or two feeding cycles. If not, check your water source and flour type.
Problem: My Starter Has a Pink or Orange Streak
What it means: This is a warning sign of contamination from harmful bacteria.
Fix: Discard the starter immediately. Do not try to save it. Thoroughly clean your jar with hot soapy water and start fresh. Visit our store to get a fresh, active heritage starter.
Problem: My Starter Has Fuzzy Mold
What it means: Mold (green, black, white fuzz) indicates contamination, typically from airborne spores.
Fix: Discard and start fresh. Ensure your container is thoroughly cleaned between uses. Do not use a container that previously held savory foods without a thorough wash.
Problem: My Starter Is Too Sour
What it means: High acidity from extended fermentation or high temperatures.
Fix: Feed more frequently, use a slightly higher ratio, or keep your starter slightly cooler. Using a smaller amount of starter relative to fresh flour (like 1:5:5) also dilutes the acidity. You can also try incorporating a portion of whole wheat flour.
Problem: My Starter Rises Then Collapses Before I Bake
What it means: You missed the peak. The starter rose, ran out of food, and began to fall.
Fix: Use your starter when it is at its peak — domed on top, doubled in size, and full of bubbles. Get to know your starter's timing by marking the jar and observing over several feedings.
Problem: My Starter Is Stiff or Thick
What it means: Too much flour relative to water in your feeding.
Fix: Ensure you're measuring by weight, not volume. Adjust to a true 1:1:1 ratio. A healthy starter should have the consistency of thick pancake batter. Read our 1:1:1 feeding ratio guide for reference.
Problem: My Gluten-Free Starter Isn't Behaving Like Regular Starter
What it means: Gluten-free starters behave differently — they may not dome or double the same way.
Fix: Follow our dedicated Gluten-Free Starter Feeding Instructions. Look for bubbles and a spongy texture as signs of activity rather than height. Our Gluten-Free Sourdough Starter is specifically formulated for GF baking.
Still Stuck? We're Here to Help
Sourdough troubleshooting is part science, part observation. The more you bake, the more intuitive it becomes. In the meantime, feel free to contact us — we love helping bakers at every level.
And if you're ready for a reliable, already-active culture, our 233-Year-Old San Francisco Starter and 900-Year-Old Dutch Heritage Starter are trusted by thousands of home bakers.