I have a propane fired Masterbuilt Pro Vertical Smoker. After smoking several times on it, I'm very satisfied with the results thus far. My question is: How is the best way to clean the four wire racks? And does each wire on each rack have to be perfectly clean, down to the shiny metal & all the way out to the ends? I know clean racks make for better food release in the end, but cleaning those babies is one heck of a chore. I do scrub them with a Brillo-type pad with soapy water to get all of the attached food bits off but there is still some discoloration on the racks. Just interested in what others do about this.