Wipe the Balenciaga leather handbag down with a soft, dry flannel cloth to remove any dust from the surface.
Squeeze a small amount of a cleaning product designed for leather use on a soft cloth. Test an inconspicuous area of the purse with a small dab of cleaner to see how the leather reacts. Avoid using the product if you notice an adverse reaction, such as staining, discoloration or a sticky feel; a compatible cleaner will leave the leather feeling smooth and without any dark spots.
Apply the cleaner to the purse in a gentle, circular motion, working with the grain of the leather. Buff the bag with a soft, dry cloth. Allow the bag to dry for at least two hours, away from direct light.
Finish the cleaning process by treating the leather bag with a conditioning cream. Check the handbag's care label for recommended products. Work the cream into the leather in small, circular motions.