For our products that are pre-painted, use a smooth rag with water and lightly wipe boards to clean minor spills, . If you need to clean a spill that has dried, use mild soap and water. Do not use oil-based cleaning supplies or wipe aggressively. For products that are unfinished/raw lumber, do not use water or any cleaning materials for spills. Products that are unfinished require a finish to be applied before cleaning spills. We recommend inspecting each board before applying a finish in case a light sanding is needed