It’s also good to give the smoke stack a good through cleaning yearly. I put some grill cleaner through it then hose it out real good and air dry overnightI had not removed my drip tray and heat deflector in about 6 months of cooks. I filled two large 18" metal dustpans worth of ash out and I noticed it cleaned up my smoke. If you haven't in a while, jack up your Bull to the max temp, let it do a good burn off and then scoop or vacuum out the bottom. My ash was almost piled high enough to go down into the burner compartment where the pellets light. Can't be good for a clean smoke...