Clean marker from projector board

An alchohol based hand sanitiser should work (idk why, I think the alcohol does something to the ink to make it come off easier, but its worked for me before on whiteboards) just put some on the mark and scrub it with a cloth, it will probably smear it a bit but you can use a dry bit of the cloth to wipe any residual ink away. I think. I've used this like twice so if you try it and it doesn't work I'm very sorry!!

I will try tomorrow in class anc let you know