Make sure to brush the waffle iron grates with oil on both sides EACH time to pour in more waffle batter. This will help to make the waffles as golden and crisp as possible, and help them easily come out of the iron too. After the waffles are cooked, don't stack them on top of each other. The warm steam from the other waffles will make your waffles get soft. Instead, serve them right away, or place them in a single layer on a baking sheet with a rack on top. (You can keep them warm while cooking the rest of the waffles in an oven preheated to 200 degrees F.)