Many people end up with a first pancake that is not as light and fluffy as the rest of the batch. This is because the pan wasn't lightly sprayed with excess removed or the skillet (medium heat) wasn't hot enough before pouring the batter the first time. The way to test if a non-stick skillet is ready is by wetting your fingers on one hand at the kitchen faucet and then thump the water into the pan. If the pan sizzles, it's ready. If nothing happens, give it a couple more minutes and test again. Keep the temperature on medium heat the entire time.