bayoubill
aka Sheik Yerbouti...
I don't put wooden handled knives in the dishwasher.
I do put my cheap steak knives in.
I don't know from residue..I notice that my silverware is dirty when I put it in handle first. It's not dirty when I put it in handle up...and I've noticed that in all the dishwashers I've used through the years.
the residue may be imperceptible, but just keep in mind that, since you put the folks and spoons with the eating end down, you end up eating that residue...