First I'd scrub the can like others mentioned, bleach works wonders. Next, I'd always line the can with a plastic bag or paper and plastic like someone else suggested.
Finally, go down to the local car wash or pep boys and pick up a small can of this stuff called OZIUM. It is an odor neutralizer. A 1 second blast is enough to neutralize a 12' X 12' room, so about a 1/2 second should cure your trash can/kitchen....READ the instructions though...you don't want to spray it with kids around...we usually do it right after we clean up and leave the room for the night.