How to get highlighter out of an iphone crack?

My iPhone cracked recently so I decided to color it with highlighter. However while I was coloring it, the highlighter smeared onto the crack that was on top of my camera. Any ways to get the highlighter out of that crack? No, I don't want to get a new iPhone, and I can't replace the glass.

Rubbing alcohol, swipe it on and let it evaporate.

And next time, don't color on your phone with highlighter dum-dum.