<human>:  How to clean a leather sofa?
<bot>: To clean a leather sofa, you should begin by vacuuming it to remove any loose dirt and debris. Next, mix a small amount of pH-neutral detergent or soap into a bucket of warm water and lay a microfiber cloth in the solution. Gently scrub the sofa, working in one direction, then rinse the cloth and repeat with a clean section of the cloth. Finally, dry the sofa off with a clean, dry towel.