I have had my CS for about a year now, and I have never once cleaned my smoker. I do as some of the others suggested above and line the bottom of the smoker and the top of the woodbox with foil so that when the smoker gets too greasy I can just change the foil and scrape out any excess grease which gets under the foil. I also poke a hole in the foil corresponding with the hole in the bottom of the smoker and place a disposable aluminum drip tray to catch the grease, otherwise the grease pools in the bottom of the smoker and accumulates rapidly. Be sure to check the drip tray occasionally so that it doesn't overflow and get grease all over the floor, because it can get full pretty fast when you are cooking large pieces of meat.
G'day,
Micah