I've seen several posts now that people prep, sterilize, clean, ect the smoker before putting meat on. Fairly new to the world of smoking and am madly in love. Have done sooooo many things on it already and just warmed her up to make up my jerky. So what is this prep of the smoker I keep hearing of and why do you do it??? I'm using a Green Mountain Grills electric pellet smoker.