Try alcohol swabs. You may have to go over it a few times though. Hold the swab on the spot for a second before you wipe the spot clean.
if it is on the housing (plastic / non screen part) get the aeresol version of "goof off" be sure to use it in a very very well ventilated area ----------------------------------------------------------------- To remove a permanent marker mark of an lcd screen (what i did); dab a little hand sanitizer on a napkin then rub the affected area. This has been proven by me, this will not ruin your screen.
I have found nothing to get permanent marker off of anything. That is why it is called permanent. It stays.
Not coming off
I would try fingernail polish remover. That will take permanent marker off of almost anything.
to get permanent marker off my backpack is nail polish remover or it will just faid away eventually
you use sunscreen
bleach or hard scrubbing um, try this, put dry erase marker on top of the permanent marker and erase it with a tissue
A permanent marker was used to stay forever, but they don't. A regular marker is easy to wash off and doesn't stay for a very long time.
a black permanent marker by the brand sharpie that produce the best permanent markers in the world
use rubbing alchahol
try using hairspray
Put some Dawn on it.