As with all wooden products, hand washing is the best way to clean them. If you find that your wooden top block table is starting to show signs of wear and tear, you can restore it with a food-safe wood conditioner, such as this one here by Howard Products. Firstly, clean and dry the top. Then generously apply the conditioner with a soft cloth and leave it to soak in before removing the excess. This application should be done every couple of months to keep the butcher block table in its best condition.