Umm I kind of just pick up the charcoal grate and make all shake it a little bit so the good ones stay on and the burned up ones fall through. I'm supposed to clean them somehow? I only recently realised that I could re use the stuff don't know why I never thought of it before. Before the only stuff I re used was lump that didn't burn all the way or much at all. Now I reuse everything till it's completely gone which has improved my efficiency by 4 fold, thanks to this site.
Y'all are truly a very good little comunity.