Oh No!!! You just used a permanent marker on a white /dry erase board!!!!
With this simple trick you'll be able to erase permanent Sharpy marks from your white board.
All you need is:
1. Regular Expo dry erase marker
2. Dry eraser or paper towle
I only tried erasing permanent Sharpy marks. Let me know if this trick works on other brands as well.
Step 1: STEP 1: Dry Erase Marker
Begin by scribbling with your dry erase Expo marker all over your permanent marks.
Next erase the scribbles.
If all of the perminate marks do not come off the first time scribble on it again with your dry erase marker, then erase again.