1. remove the cooking grates to a piece of plywood or sheet metal lying on your grass
2. pressure wash the cooking grates, both sides
(This knocks off all the crud and most of the grease but leaves the grates with enough grease so they don't rust, just exactly what you'd want
3. use a floor scraper to scrape the heavy off your RF plate. Remove buldup to bucket.
4. open the cleanout drain, which should be a 2" pipe at the lowest point
5. pressure wash the inside
6. light a fire and warm it up to dry it out
Takes less than an hour including getting out the floor scraper and pressure washer, and putting them away again.
I don't clean the outside of my smoker except once or twice a year.
LORD PORKAVORE HAS SPOKEN