<human>:  What is a good way to clean a leather couch?
<bot>: A good way to clean a leather couch is to use a mild soap or leather cleaner specifically formulated for use on leather, diluted in water. Use a damp cloth to gently scrub and clean the couch. Afterwards, use a dry cloth to dry the couch. Finally, apply a leather conditioner to keep the leather soft and supple.