Put a dab of moisturizing, chemical-free soap on a soft, damp cloth and rub it in to create a light lather.
Rub the damp cloth on the sofa. Be careful not to let too much water contact the leather.
Wipe the lather off with a new damp cloth.
Buff the leather with a dry towel. Let the sofa dry completely.
Scoop out a small dollop of shoe polish (color match the sofa) with a soft, dry cloth. Rub it over the leather in a circular motion. Buff the leather with a clean, dry, soft cloth.