Wooden cutting board need a major maintenance at least once or twice a month, depend on how often you used it. after you clean the cutting board and dried properly. First rub the board with lemon juice or white vinegar. Sprinkle some (sea)salt on top and rub the salt and the juice or the vinegar over the board and leave it to soak for 15 minutes. This makes the cutting board squeaky clean. Rinse the cutting board and dry it with a cloth or paper towel. It is important that the board is well dried before oiling.
Some recommended on internet mentioned for oiling a wooden cutting board is best to use an odor-and flavorless oil. Almond or grapeseed oil are good choices. White mineral oil is also suitable. They warning that do not use olive oil because this will become sticky and gross. How to apply oil on cutting board, drop some of the oil on the cutting board and rub it with a piece of kitchen paper or a clean cloth. After drying it, preferably store it upright. You will have a long-term cutting board for years.