<human>:  I need to know the best way to clean a leather couch without damaging it.
<bot>: The best way to clean a leather couch without damaging it is to use a damp cloth and a mild leather cleaner. Make sure to apply the cleaner in small amounts, as too much cleaner could cause damage. After applying the cleaner, wipe the couch with a clean, dry cloth to remove any excess moisture. Be careful not to scrub too hard, as this could damage the leather.