Slight differences may occur being handmade. Color and grain of natural wood varies in each item. Do not use in a dishwasher. Do not soak in water. Do not place near open flames. Wipe the surface with dry or tightly wrung out dishcloth when cleaning. Sudden temperature change and humidity may warp or crack the product. Avoid direct sunlight, dry well after use and store in a dry place. Slight scratches, darkening, or dents may be found on brass. Do not leave brass wet as humidity may cause the color to change. With continued use, the color of brass surface will change due to oxidation. To clean the brass, use a commercial metal cleaner and follow its directions. There may be a chance that green rust occurs on brass. However, it does not affect quality. When adjusting the height of the stand, hold the ring while unscrewing the knob.