The key to cleaning a white Christmas tree is to avoid using harsh chemicals or abrasive materials that could damage the finish. Instead, start by gently dusting the tree with a feather duster or soft cloth to remove any surface dust or debris. Then, use a damp cloth with a mild cleaner, such as white vinegar or dish soap, to wipe down the branches and ornaments. Finally, let the tree air dry completely before adding any decorations or lights. By following these simple steps, you can keep your white Christmas tree looking its best all season long.