What a waste of lemon juice (just kidding) But, have you ever been to a BBQ joint? Their smokers are BLACK inside.. never get cleaned or scraped. Same for the most part with the racks. I, however,do clean my racks with the least offensive means I can find.
I messed up my Smokette by being aggressive with the funky racks they provide.. NOT stainless.. but cheap plating (IMO). However, they still work. With my Amerique, I use the dish soap, hot water and the Home Depot tub mentioed above.. works like a charm. The only thing I clean inside the smoker other than the grates is to scrape the "roof" with an old credit card to keep junk from flaking off and falling onto the meat.