My sourdough has weird stains.Updated 12 days ago
Have you noticed something on the surface or around the rim of the jar that you have never seen there before? If you haven't fed your sourdough for a while, these could be signs of spoilage.You can now check whether it is yeast or mould. Creamy yeast is harmless, but mould is unfortunately a reason to dispose of your starter.
If at first you only notice a very small spot in your starter and you are not sure whether it is mould or yeast, wait a few days until you can better identify what it is.