We admire a patina of use that builds up on a surface as an item is used and leave our leather surfaces raw so that they may collect these badges of use. That being said, leather can scuff, scratch, stain or be ruined by moisture if treated improperly. If you wish to protect your leather you may coat it with a leather protector.
To clean leather surfaces, dust them with a dry cloth. Do not use soaps, chemical cleaners or detergents on leather - inappropriate cleaners can soak into the leather, changing the ph balance and damaging the natural fibers.