I have two starters, yogurt-based one I started in 1981 (once unused in the back of fridge, unfed, for 2 years and it revived nicely) and the other white grape-based one started in 2013. I've dehydrated both but the grape one got moldy. The other dehydrates nicely and I have mailed it literally all over the world. I keep my dried starter in the freezer because I have a large chest freezer and it's easy for me. I think I will try storing at room temp.

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