Hi everyone. I am new here and this is my first time asking a question so I apologize if this is in the wrong place. So far I have been able to answer any questions by using the search bar, but I can't really find an answer to a couple of questions I have. I have a Char-Broil box smoker like the one in the picture. It has a thick black coating on the inside from using it all summer. I have read that it should be cleaned periodically but I have had friends tell me it should never be cleaned since it is good and seasoned. My first question is, should it be cleaned periodically? My second question is if it needs cleaning, what is the best way to clean it? I thought maybe starting a hot fire inside it and letting it burn off. Not sure that is a good idea. Any help is greatly appreciated. Thank you in advance for your help.