Since these beautiful spice boxes are by exclusive lane and carefully curated with natural wood, the brown color visible is actually the natural color of the wood. On top of it, the significant shine visible on these spice boxes is because of the natural oils. Therefore, the best way to clean a spice box brass is by wiping it with the help of a dry clean cloth. Although, it is advised that you refrain from cleaning your spice box if you have to, then use a clean wet cloth to clean out all the content gently.