With proper care and attention, your humidor will last for many, many years. You can help maintain your humidor by storing and cleaning properly.
Storage: Make sure your humidor is kept on a flat, level surface to guard against accidentally being knocked over. Never place your humidor near a heating vent or in direct sunlight, such as by a window. This could raise the temperature inside the humidor, as well as cause fading to the finish. Keep your humidor in a dry, cool place.
Try not to place items on top of your humidor to avoid scratching as well. Avoid storing lighters, cutters, punches, matches, or other objects inside the humidor.
Cleaning: Always use a soft cloth to polish your humidor, or to remove dust and fingerprints. You can use a high quality furniture polish to protect the outer finish.