Show us your worst, the "shame in your game" if that's you feel about it. Consider this the ugly duckling, the daily driver, the worn warrior, the antithesis of beauty thread.
Here's a quality assortment of grease, ash, random charcoal bits and dirt:
My only regret here is not having taken a picture of my dad's old 18.5" lid before I cleaned it, with a large grease layer hanging off like a sheet of wallpaper.
I'm sure some of you can similarly oblige.
Engage.