The simplest way to clean a leather couch at home is to do a basic clean on a weekly basis. Vacuuming the couch to remove pet hair, food crumbs and other items is an easy way to prevent stains and smells. Use a soft-bristle vacuum attachment to avoid scratching the leather. For an accidental spill, wipe up the affected area with a cloth immediately and follow it up by wiping the area with a damp cloth to prevent stickiness.
If a leather couch is stained, there is a simple way to remove it. Dilute a small amount of nail polish remover in water. Test the solution on an inconspicuous area of the couch first to ensure that it won't change the pigmentation of the leather. Apply the nail polish remover solution to the stain and allow it to sit for at least a minute before wiping it off with a damp cloth and drying the couch.
To clean the whole couch, mix a small amount of a mild dish soap with a bowl or bucket of clean water. Dampen a rag in the soap and water and wring it out before wiping down the couch with the moist rag. Wipe the soap off with a rag dampened in water to remove the soap before drying the couch. Use another rag to restore the leather's shine by buffing the clean leather couch.