Rotate the die with dice of the same type. Never let another person touch or use your die. Never touch or use somebody elses die. These dice should only be used a couple of times during a session. Also, nobody should come in contact with them except for the owner.
Nobody likes to change jobs all the time and a die is no different.
A die that knows what it is suppose to do will tend to do it more often then not. If a die fails to give satisfactory results after a couple game sessions, it must be punished. There are many ways to punish the die. If a die fails to give satisfactory results after a few game sessions, it must be banished to a lonley place such as a drawer. All the other dice should be lined up with their high number facing the guilty die.