I was doing fine making whole and lowfat yogurt using regular yogurt as a starter. But then I tried using nonfat milk, and Fage 0% yogurt as a starter. And it didn't thicken. Tried again with Trader Joe's nonfat Greek style yogurt as a starter. Didn't thicken.
Anybody else have these issues? Do you think I should go back to regular yogurt as starter, or go back to milk with some fat in it? TIA.