Add the vinegar to the water. Add water mixture while stirring and beating to make a smooth batter. Cover with cheese cloth, put in a warm place to allow the batter to get sour for around 12 hours, you will know when it is sour when there is a strong yeast smell. At this point, pour the batter into a quart jar with a lid and ring on it. Place into the refrigerator. This can also be frozen. To get the best results, use the starter about once a week.