All cutting boards and butcher blocks should be regularly sealed on a monthly basis. Cutting Board food-grade mineral oil is actually the best oil to use on all cutting boards and should be applied after washing and allowing your board to thoroughly dry. Then generously coat your wood surface and allow the oil to soak in overnight. Remove excess mineral oil with a soft cloth, and the board is ready to use again. Clean your boards with soap and water, occasionally with a quick rinse of a very mild bleach solution, and allow your boards to dry while sitting on its edge will help prolong the life of your boards.