Have you tried offering them $5 for every time they bring the robot back broken?
In all honesty, we find constant encouragement helps a ton. After the match, don't talk to them about what they should have done - talk to them about what they did well. That will help to build their confidence, which will in turn make them more agressive. Plus, they'll know what they're doing well, and they'll try to do everything else better as a result.
Or, you could just go the route the father of our main driver suggested the other night... give her a shot before every match. I think he was joking. Or I should say hope
