It is possible to buy a special leather cleaner, but you could just use a damp cloth and soapy water to clean it, just make sure you dry it properly when finished. I wouldn't recommend using polish on it.
hi you can get specialist leather cleaner (mine came from the shop I bought my suite from) - other than that just a clean damp cloth - I wouldn't recommend using soap or any type of cleaner. I've had my leather suite just over a year now and it looks as good as the day I bought it.