Keep wiping down the board with your clean towel until it no longer picks up dirt and dust. Always use gentle, soft towels or paper towels. Never use abrasive pads or scrubbers!
Adhesives like tape and glue will also rip up the coating when removed.
Any marker left on for more than 24 hours is at risk to leave “ghost” marks. Very stubborn stains can be removed with a little propyl alcohol. Or, you can prepare a mixture that is 50 percent tap water and 50 percent isopropyl rubbing alcohol. Wipe the whiteboard, then dry it off with a clean cloth to remove alcohol remnants—don’t let alcohol dry on the board. [7] X Research source
Note, if you work too slowly you may dry the black marker on there, completely defeating the purpose! You can also use this method to spot clean certain marks. Just make sure they are completely covered with ink before erasing. [8] X Research source
In a pinch, denatured alcohol can work as a more powerful cleaner than water, and it shouldn’t harm whatever original finish you have left.
WD-40 will make the board usable again, but it may also lead to slightly streaky writing. It is nothing that makes the board unusable, but it should be noted.
