A mop having a mop head with a first sponge member supported to a bottom side thereof and defining a first floor engaging surface. A second sponge member is supported on the mop head and defines a second floor engaging surface. The second sponge member retains a releasable cleaning substance for facilitating cleaning of a surface engaged by the mop. In addition, the second sponge member forms a replaceable auxiliary member which is detachably mounted to the mop head and includes hinged retention members for engaging within receptor passages defined in the mop head wherein the retention members facilitate engagement with and disengagement from the mop head.