The most important thing you can do for your cutting board is to keep it clean. After each use, wipe down the surface of your board using a hot & soapy cloth. DO NOT submerge the board in water and DO NOT EVER put the board in the dishwasher. Try not to let liquids of any type sit on the board for long periods of time (water, brine, blood etc.). Always wipe your board dry using paper towels or a towel after cleaning. Water and wood do not mix! Water will cause the wood fibers to swell which will result in your board warping or cracking. Oiling/waxing your board will occupy the wood fibers preventing the water from entering and causing damage.

You should oil/wax your board at least once a month or when it looks noticeably dry. Doing this simple step will help prolong the life of your board for years. Using a cloth or paper towel, apply the wax to the entirety of the board and allow it to penetrate the wood overnight (or at least 12 hours) before use. Wipe off any excess oil/wax with a dry paper towel. Mineral oil and bees wax used together are your best choice and you can find many food safe blended products at your local hardware store. Do not use any other kind of oil or wax on your boards!

Sprinkle kosher salt on the stain (or on your whole cutting board) for a good cleaning. Cut a lemon in half and use it to rub the salt into the board, squeezing the juice from the lemon as you go. Let it sit for 2-5 minutes before wiping down the board with a damp cloth and hand dry with a towel. For really stubborn stains a fine grit piece of sand paper  will do the trick. Always sand with the grain of the board. A new coat of wax will need to be applied after sanding.