It was awful.
If it had been any more sour, my head would have imploded. Tart, tangy, puckery--those don't even come close to describing the hurts-your-ears-because-it's-so-so-so-sour flavor.
But the fix was incredibly easy. Add sugar by the tablespoon. And suddenly bad sour mellows into sweet citrus-ey with just the right amount of kick. Amazing how quickly and simply this fixed itself. Click here for the recipe.