To clean wooden cutting boards properly, you'll need a good butcher block oil
Clark's Cutting Board Oil – Laurel Mercantile Co.
Food Grade Mineral Oil For Cutting Boards
Amazon.com: Howard Butcher Block Conditioner and Cutting Board Oil 12 oz, Food Grade Conditioner and Oil, Great for Heave Use Cutting Boards and Utensils, Re hydrate your Cutting Blocks : Health &
Amazon.com: HOWARD Butcher Block Conditioner and Cutting Board Oil, Food Grade Conditioner and Oil, Great for Wooden Bowls and Utensils, Re hydrate your Cutting Blocks, 12 Fl Oz (Pack of 1) :