After 10 minutes, remove the towel and turn the mixer back on to medium-low speed. Knead the dough, occasionally using the spatula to pull down the dough if it climbs up the hook, until the dough is smooth and elastic, 6 to 8 minutes. At this point, the dough will be soft, sticky, and easily pull away from the sides of the bowl. Increase the mixer to medium-high and drizzle in the oil, kneading until absorbed, about 2 minutes.