The best method for cleaning leather is determined by the type of the stain and the type of the leather. Before cleaning leather, determine whether the leather is finished - like luggage, furniture and garments - or unfinished - like baseball gloves, work boots and saddles. Cleaning leather is a dangerous game. Cleaning can change the color or appearance of the leather. Always test the cleaning on a small invisible patch of leather before proceeding on the whole item. Avoid products like mink oil, shoe polish and waxes when cleaning leather furniture or garments. Seek the advise of a professional.