How to care for your wood cutting board so it lasts a lifetime Becky Krystal, The Washington Post March 1, 2021 FacebookTwitterEmail If you're using the board every day, treat it with food-grade mineral oil at least once a month.Photo by Scott Suchman for The Washington Post. It's easy to take for granted things that are always there for you. As much as this applies to the important people in your life (paging Carolyn Hax!), what I'm talking about here is in the kitchen - the items you use every day, such as knives, skillets, dish towels and cutting boards. You can make a case that all those tools are routinely put through the wringer, but I think the cutting board really takes the most abuse day in, and day out. And I'd wager it's the one that many of us, me included, don't give enough attention to in terms of maintenance.