If so, how? How thoroughly? This has not been much of an issue for me in the past since I was smoking 1 or 2 items at a time I would just put a foil pan under to catch the grease. My last smoke was 4 racks of ribs and a Brisket flat. 2 racks of ribs with just a little trim completely fill a grate so I tried putting a baking pan under the ribs but it blocked the heat from getting through and I removed it. The empty water pan caught a lot of grease and the grease collection tray caught a lot, but there is still a lot of grease in the burner area. Do I need to clean this out?