Problem: can't erase on whiteboard
I recently decided I needed a bigger whiteboard and so, in true instructable style, made one out of a fridge door. Unfortunately the fridge door had some stickers on it and I removed them with orange oil and some other cleaners. Now when written on, the whiteboard marker will not erase. Instead it smudges and cannot be removed even with water.
What can I do to make my whiteboard usable agian? I've heard car wax can be good, should I try this?
Any help or suggestions would be appreciated.