You want your cutting board to last a long time. And you can help it do exactly that by taking the time to clean and oil it. The method is very simple:
Thoroughly clean and dry your cutting board before you apply the oil! Let the wood absorb the oil for several hours so that all of its pores are exposed! Then, use a paper towel or cloth to spread the mineral oil all over again, and wipe off any excess from both sides of the wood. After the oil has absorbed for at least one day, you can put away your cutting board and use it when needed.