Get a crockery pot (a ceramic cheese pot is perfect) for the sourdough starter. Scald the pot before putting in the starter. Always keep the sourdough in the refrigerator.
A good sourdough has a strong, sour milk odor. The sour smell is a part of normal “aging”. The liquid separates from the batter when it goes too long without use. To restore the sourdough starter, just use it, or “sweeten” it with a teaspoon of sugar stirred in. If replenished (by using) regularly, the starter stays fresh.
Mix ingredients well. Keep in a warm place overnight. Next morning, put 1 cup of starter mixture in a scalded container with a tight cover and store in the refrigerator for future use. This is basic sourdough starter. The remaining batter can be used immediately for pancakes, muffins, bread or cake. This starter, when replenished every week with flour and water, will last for years.