The idea is to start with the device (powered up) very close to the object. Circle it s-l-o-w-l-y around the object while s-l-o-w-l-y increasing the distance. As the field slowly changes position and weakens, molecules in the object orient themselves randomly, just what we want.
The worst thing to do would be to start with the device close to the object and move it away fast in a straight line or power it off close to the object. That will leave the molecules in the object oriented in the same direction, just what we don't want.
The worst thing to do would be to start with the device close to the object and move it away fast in a straight line or power it off close to the object. That will leave the molecules in the object oriented in the same direction, just what we don't want.