A leather cleaning kit is the best way to clean white leather furniture and can be purchased at most furniture stores. The kit will contain a bottle of cleaner, bottle of conditioner, and a spot stain remover, along with a cloth and/or sponge. First, apply a small amount of the cleaner onto the cloth and wipe using a circular motion. Next, remove any stains or marks using the spot stain remover. Once the furniture is dry, use a clean cloth to apply a small amount of the conditioner, and gently rub it in using circular motions. It is important to do this regularly to keep your leather looking its best.