Wipe the leather upholstery with a dry microfiber cloth, or vacuum it with a soft brush attachment to remove any surface dirt or dust.
Apply a small amount of leather cleaner to a soft, dry cloth according to the cleaner's instructions. Wipe one small area at a time, focusing on particularly dirty areas. Wrap the cloth around your finger to reach any small crevices.
Apply leather conditioner to a clean, dry cloth according to the conditioner's instructions. Wipe a thin, even layer of leather conditioner over the upholstery.
Wipe away any excess conditioner with a clean, dry cloth until the leather shines.