Dancing and Sticking Salt Mystery-Hannah

In this extension, I determined why the salt sticks to the insulator but bounces off the conductor. I determined that it's due to the fact that, conductors carry a charge while insulators do not. The evidence I have for this is the first experiment and the third experiment. In the first experiment, the salt was able to stick to the tube due to the fact that the tube was a conductor. But in the third experiment since I brought a charged insulator over it, it did not work because insulators do not carry a charge. The reasoning I have for this once again is, conductors will always carry a charge not matter what so they can attract objects easily. On the other hand, insulators do not carry a charge so they can't attract other objects with an opposite charge.