Thoroughly wipe the cutting block and sprinkle salt liberally across the surface.
Once it's spread out, walk away and leave the salt to do its cleaning. A few hours will work. No time? That's alright. You can still get a nice clean board from what I'm about to show in the next step.
Wet your hands. Start rubbing your hands on the board. The salt with clump and form a slight paste. Use the salt to scrub the surface of the board. You'll also achieve soft hands. Think, spa salt scrub.