Many new boards will come with a protective clear plastic sheet covering the markable surface. Make sure that you remove any existing protective cover before attempting to use your markerboard. You may lightly cut around the trim of the board and use your finger nails to pull up the clear plastic sheet.
Always whiteboards and markable easels when they are now as some residues may be left on the surface from the manufacturing process. Preferably, clean with MooreCo Green EraseTM board cleaner and a microfiber cleaning cloth. Alternatively, use a glass cleaner or an alcohol based cleaner. Be sure to completely rinse any remaining residue from the board by lightly rinsing it with clean water after cleaning.