hs161

That acetone-like smell is definitely a sign your starter is a bit out of balance, even if it’s still bubbling and rising. It usually means the yeast is running low on food and producing those solvent-like compounds. Since you’re feeding equal parts flour and water, maybe try increasing the feeding frequency or the amount of flour for a few days to give it a boost. Sometimes a warmer spot or a different flour blend (like adding some whole wheat or rye) can help too. I’ve had my starter do this after a few days of neglect or if the room gets cooler than usual. It usually recovers fine with a couple of good feedings. If it starts to turn pink or develop mold, then it’s time to toss, but that smell alone isn’t a death sentence. Just treat it like a hungry pet for a bit!