5. Place the all-purpose dough ball under the faucet and run cool water over it. Squeeze the dough ball to drain white,starchy water. Continue doing this under running water for about 5 minutes. What happened? Note how the dough shrinks in size,changes color,and becomes thread-like. these are the gluten threads. The water that drains from the dough ball is white as the starch is washed out of the dough ball.