If you want the head to stay on better, super glue some small & thin magnets to the bottom of the head. I did this and it works so well you can lift BB-8 up by his head. It also doesn't impead his speed or functionality. I also put a small piece of tape over the magnets to keep from scratching the body.
The simplist way to clean the wheels is to take a Q-Tip, dip in alcohol and clean the wheels by rotating them. I know it's not as fun as taking the head apart but...
It wasn't mentioned but what is the speed of the A5 SoC?
Quando isso acontecer, você poderá ver um gráfico da reputação que ele adquiriu ao longo do tempo.
Aqui está uma prévia de como será o gráfico:
Nenhuma reputação adquirida ainda.