So you add only flour? That’s the timing of the pre bake feed I’ve been doing but it never smelled or tasted sour. I mean the bread is delicious but not actually sour. Also I was adding equal measures of flour and water and am now doing equal weight. The starter is much thicker.I take the starter out of the fridge in the early afternoon and stir in 1\4 cups of flour. I usually start the bread at about 7pm or so. The starter foams and becomes sour that way.

