I clean mine every time. I got mine from a friend that was upgrading, and it was nasty inside even had a creosote buildup in the stack. After a good cleaning it performed fine. For me it is a quick job, After cool down, I lift out the grill, and drip pan, lift out the heat diffusion plate and vac the inside of the barrel. The inside is always covered with ash and tiny particles which is what I think is small pellet dust that was blown out of the fire pot. I don't want this stuff blowing up the side and landing on my next cook. I reinstall the pieces, put a new piece of foil on my drip pan and 15 minutes later it is ready for my next smoke. I follow the traeger start up procedure for my 075, turn the controller to smoke, with lid open and close lid after 15 minutes, and set to preferred temp. I am not Mr. Clean, I just don't like dusty protein.