Hand wash only with warm water, mild dish soap, and a soft sponge. Do not soak the board or place it in a dishwasher.
Dry it promptly and allow air to reach both faces. Store it on edge when possible.
When the wood begins to look dry, apply a food-safe cutting board oil, let it absorb, then wipe away the excess. A board cream or wax can be added afterward for extra protection.
Avoid prolonged heat, direct sunlight, and standing water. Light surface marks can be refreshed with fine sanding followed by fresh oil.