In order to preserve the beauty and utility value of your Nesmuk board for as long as possible, you should never clean it in the dishwasher but only by hand. The board should not be left in the water. After cleaning, the board should be well dried and stored airy and dry. Wood is a natural, living material. In contact with water, the Nesmuk board may warp slightly. This should decrease after complete drying. However, slight warping does not represent a reduction in quality. The tannic acid in oak can cause discolouration of the wood after prolonged contact with rustproof metals. This is completely harmless in terms of food hygiene. For the care of all Nesmuk boards, we recommend the use of the Nesmuk care wax oil. Made from pure vegetable oils, valuable natural resins and the finest beeswax, it reduces absorbency and solidifies the wood surface. Rough spots can be smoothed before oiling with the enclosed abrasive fleece or the rough side of a rinsing sponge.