My kids did that and I think I used Goof Off or mail polish remover to remove it. Try it on a small section first.

I goggled it and there were lots of suggestions - here's one.

Here is a link that might be useful: remove marker

Try plain old rubbing alchol

I clean my board with Magic Eraser - works like a charm!

Haven't tried it on a white board, but I have had success removing permanent marker from other surfaces with hair spray.

I'm a teacher and I've done this many times. The easiest way to fix it is to trace over the permanant marker with a dry erase marker and then just erase it. It's as simple as that! It works like magic!

I use window cleaner. Works well.

Wow, nookie. I wouldn't have thunk it. I'm going to see if that works on my plastic tablecloth that the grandkids keep messing up.

Thanks a bunch for all the replies. Who knew?????????? I used nail polish remover and it worked like a charm.

nookie's answer is interesting. Too bad it wouldn't work where we have had people write on the wall inbetween two white erase boards. I too would've said magic eraser or a degreaser, e.g. 409. I'm glad the nail polish remover didn't harm it. And good to know I can use that if I ever need to.

;)

Generic window cleaner (aka Windex.)

If nookie's suggestion does not work, try the cleaner for glass stove tops. It should work too.

Then nail polish likely damaged the surface of the white board, and now you're liable to have trouble getting even the erasable markers off it.

When someone used a permanent marker on a whiteboard at work, someone did what nookie suggested and it worked perfectly with no damage to the board.