After about a year, the inside of my GOSM is getting a nice crust inside -- probably a combo of grease, creosote, apple juice and other assorted mopping material, rub crust, etc. How often do y'all clean your smokers? Do I risk doing any damage to the propane burner if if clean the cabinet walls (not the burner or anything near it) with a pressure washer? Or does it even matter? Sometimes, I'm tempted just to leave it. That way I can swipe my finger inside it on my way to work and get a morning smoke/creosote/cancer fix.