This was the simplest of starters: unbleached white flour, a little wheat flour, cumin and water. I'd used and used it, nurtured it for months. After using it last time, about a week and a half ago, I'd fed it and put it in the refrigerator as usual. We tried to proof it beginning Friday but it never foamed after two days, looking instead very inactive, although it produced lots of hooch. Not trusting that it would work and hating to waste ingredients, I disposed of it and have started a new one.
Does anyone have any clue as to what the devilment may have happened?