Wash your product in mild soapy water and wipe it dry preferably right after use. Avoid soaking and do not put in dishwasher. Apply wood conditioner regularly - even if it is not in regular use - to protect your product from drying out and to keep its shine alive.
Use any food safe wood conditioner or mineral oil and apply with a clean, soft material. Let it soak in and wipe off the excess. Only apply to a completely dry product.