Some people suggest using a product called krud kuter.
How To Get Expo Marker Off Wall. No worries if those pesky permanent markers make their way into your whitespace. When not in use, expo markers stored.
Revive Dried Out Markers | Markers, Sharpie crafts, Gel pens from i.pinimg.com
Putting expo over the permanent marker and then wiping it off worked. When used gently, magic erasers will help to remove permanent marker spots off finished wood surfaces. These stains are a bit harder to get out, so use a stronger chemical.
It's removed almost every stain i've put it up.
How to get dry erase marker off a wall. Repeat the process until all the marker is gone. You will have to keep track of the markers yourself in an array or an object. I am using documentpicker api to upload files.
