... a better finished product than regular plain yogurt. Incubation Yogurt has to sit at a warm temperature for a few hours so that ... wrap the cooler up in quilts. In the past, I used an electric skillet. I put water in the skillet and stood the jars in the water, keeping the temperature adjusted by turning the skillet on and off at intervals. You can also use the pilot light on your gas stove. I&# ...