I recently decided to venture into the world of sourdough. I wanted to use a wild yeast starter. Following directions I found on the web I mixed 1oz of water with 1 oz of flour. Mixed. Day 2 I mixed. Day 3 added same amounts of flour and water. A few bubbles. Day 4 more bubbles, fed it again. Day 5 and 6 still more bubbles and fed each day. Day 7 fewer bubbles, texture thinning, fed again. Added a small amount of dried yeast. Day 8 tried to make bread. Did not rise. What happened?