Graham is the King of whiteboards. I had seen him do this trick, but read about how to get permanent marker off a dry marker board…
Graham is the King of whiteboards. I had seen him do this trick, but read about how to get permanent marker off a dry marker board…
Recall your first year chemistry, a solvent is chemically the same as a solute. The wet ink from the pen acts as the solvent and the dry ink on the board is the solute.