I strongly disagree that it dies in 3 weeks. We can go 1-2 months at times without waking our 25 year old starter. Seal it in the fridge. When you want to use it, take it out 1 day in advance. Mix it AND ALL THE LIQUID on top with a ratio of 1 cup water to 1 cup bread flour. Feed it twice a day until you want to use it. When it is awake, the starter makes a great base for pancakes as well.