KitchenAid Pro Line KPWB100 Use & Care Manual page 20

Whether one or two waffles are being prepared, always rotate the
baking unit after filling a waffle plate. This coats both the upper and
lower waffle plates with batter and ensures the finest consistency.
Don't overfill the waffle plates. Pour the batter onto the center of the plate, then evenly
spread it out to the edges using a soft spatula or the bottom of a non-metallic ladle.
The batter should almost cover the peaks of the waffle grid.