ski-freak
Meat Mopper
Here's a thread with a picture of a handy homemade clean-out tool - especially good for those OK Joes without the ash drawer, but I use it quite a lot with mine that has the ash drawer:
http://www.smokingmeatforums.com/t/126222/made-a-simple-firebox-clean-out-tool
http://www.smokingmeatforums.com/t/126222/made-a-simple-firebox-clean-out-tool