I took the cooking grate out of my SFB, as I doubt I'll ever use it.
Whenever I smoke something, the grates that the food rests on get an incredible amount of build-up on them.
I've also found that if I get a rip-roaring hot fire, say, up to 450 degrees F or so, in the main cooking chamber, I'll burn the seasoning right off the cooking grates.
I use a brass-bristled grill brush to remove excess build-up from my grates, but, that brush won't get everything off. So, my grates usually stay nice and seasoned.
Peace, Love, and Vegetable Rights!
Eat Meat and Save the Plants!