The best way to prevent warping is to hand wash your board and ensure that it is fully dry before storing it. Never wash your your cutting board in the dishwasher. Hand wash your cutting board with a mild dish soap and rinse well with hot water. Do not submerge the board in water or let it soak for any period of time. Doing so will damage the board construction or cause warping. As you wash your board, the wood will begin to soak up some of the water and could expand slightly. This is a totally normal process and the wood will naturally contract back to normal as it dries.
It is recommended to towel dry your board first and then allow it to air dry while standing on its edge for several hours or overnight. To ensure that your board dries evenly, set the board upright on its side (rotating sides occasionally) or place it in a drying rack so that all sides are equally exposed to the air. Do not set your board on its face to dry, or on a damp towel or drying pad, as the trapped moisture will damage and warp the board.
Do not use your Stags End cutting board in the oven or near a high heat source as this can weaken the joints and also cause warping.