Kokedamas need to maintain a certain moisture level at all times in order not to dry out. That is why it is recommended to mist the moss ball daily. Plus, once or twice a week, you need to give the moss ball a bath. Soak the ball in water and give it a couple of minutes to absorb as much water as it needs until it becomes heavy. Leave the excess water to drip before hanging or placing the moss ball back in the tray.