Just got it today! Clearly grease residue in- and outside of unit. Shouldn't I clean inside and grills before doing the break-in? If so, with what? (Did a search and found no info.) I'm presuming 409 cleaner is not ideal. Break-in with racks in? Instructions say no but I recall someone saying to keep in the racks so they are easier to clean later. Confirming that I use foil on floor (with hole made) and top of smoker box during the break-in also? Pam-spray the racks, perhaps, each time I'm cooking after break-in? Sorry, lots of q's.