Granted I'm not overly experienced with my FEC yet, but I've never even had much grease on the bottom and done a couple of decent loads. I don't put the food all the way to the back or front or sides to make sure it drains down on the slide. Also, with real greasy items, such as butts, I coat the grease slide with 3 or 4 easly removable (0ne at a time) pieces of tinfoil which enable me to take a real messy one off quickly before I crank the heat higher at the end.