Possible Reason: Milk did not pasteurize
Solution: After pasteurization has completed, check the temperature of the milk—it should reach a minimum of 161°F / 72°C
Possible Reason: Culture added was not active
Solution: If using store-bought yogurt as a starter, make sure the cultures are active probiotics
Possible Reason: Too much milk in inner pot
Solution: Run the pasteurization cycle a second time
