I use a yogurt maker. I take 1/2 gallon of skim milk pour it in a pot and put a thermometer in it. I heat it to between 180º and 185º and take the pot off the stove and stick it in cold water in the sink (the pot, not the milk :-P ). When it's at 125º I put in 1/2 cup of dried milk and two packets of yógourmet yogurt starter. Then I spoon it into the jars and turn on my yougurt Waring Pro yougurt maker for 12 hours. This keeps it at a constant temperature so I don't have to worry about it. After 12 hours the machine beeps 3 times and I put the yogurt in the fridge. It's easy peasy and I have smoothies for breakfast each morning and don't have to wonder about chemical or sugar additives from a store brand. :thumbup: