Was preparing a NY strip roast for company last night, when the unexpected happened. Game plan was to smoke the roast to an IT of 115-120°, remove it from the pit, raise the temperature to 475° and sear. All went well up to the sear part. While sitting inside waiting for the pit to heat up and consuming adult beverages, I decided to check on the DC, it was spewing fire out of every possible crack, the stack looked like a huge blow torch, flames were coming out all around the lid, even the small grease drain hole was spewing fire. Luckily, I keep a fire extinguisher neat the pit and was able to subdue the fire within a few seconds. The problem being that I've had the DC since 2013 and have never cleaned the inside. Damage to the pit appears to be minimal but it's time to give the inside of both pits a good cleaning. This job appears to be daunting, what is the most efficient way to accomplish this task?