Handle your wooden cutting boards with loving care. Careful maintenance can extend their life significantly. Wooden cutting boards need regular oiling to help maintain their surface and keep them from drying out. How often you do that, depends completely on how and how often the cutting boards are used. Make sure you use food grade oil and that the item is properly clean and dry before oiling. Do not ever wash wooden utensils or cutting boards in a washing machine. To deep clean your wooden cutting board, follow these instructions: rub coarsely ground salt with a halved lemon on the wood. Lemon purifies and removes odors. Rinse thoroughly, first with warm (even hot) water, then cold. Let dry in an upright position in an airy space.