Question about a Hit State effect

So essentially what I want to do i this:

When the mouse rolls over the button, the word is crossed out, in sort of a stretched out z shape, as though a kid had scribbled it.

I’ve already created a movie clip in the Over state, and experimented with using the line tool, the pencil tool, etc, and erasing it at different points on the timeline, but none of it works - will someoone help me out here?