Michael has been such a sweet helper lately. Of course, he has incentive, too, since we've been using an online job chart that he can log in and get "points" for being responsible and doing his chores. Helping unload the dishwasher is an extra chore for him, so he get exited for those additional points he gets to earn.
We also formulated a new character chart, where the kids can earn stickers for being loving and thoughtful and helpful and kind to each other. They have really been doing better with the positive reinforcement, and it makes for much more peaceful sibling relationships.