This is related to my previous question, but maybe the method I asked of removing the component is not right.

Suppose you have a global var lineRenderer:LineRenderer as your Line Renderer variable. Each vertex is stored in linePoints - how do you wipe out all the lines, so that you can start over?

Destroy(lineRenderer); does not work. It will eventually give you an error when you try to initiate to draw new lines "Can't add component 'LineRenderer' to objName because such a component is already added to the game object! UnityEngine.GameObject:AddComponent(Type)"