A mechanism by which the mop of a sponge roller mop is released without a user having to touch a dirty mop so that the sponge can be released and replaced with a clean sponge, including a sponge pin molded onto the brace which retains the sponge. The mechanism includes a transverse section with a movable hole through which the crown from the sponge pin is inserted. The wall is moved by a transverse spring force so that the wall from the opening of the trigger mechanism is placed between the crown and a lower section of the sponge pin to thereby retain the crown within the rod retaining mechanism. When a pushbutton is pushed transversely, it overcomes the spring force so that the crown is released and a downward force from the vertical compression spring forces the crown downwardly and out of the trigger mechanism, thereby releasing the sponge.

A laminated foam mop head which includes a foam block having a top surface, a bottom surface, and two side surfaces, a fabric material laminated to the bottom and side surfaces of the foam block, and a bracket attached to the top surface of the foam block such that the bottom and side surfaces of the foam block are drawn upward and inward to form a mop head having an elliptical shaped cross section and the top surface of the foam block is pushed inward and not exposed.

Flat mops and self-wringing flat mops can include a wringing configuration for applying a linear wringing motion to a mop head assembly, such as may occur along an axis coaxial with a handle. Four-point self wringing configurations may include four-point guide surfaces and/or four-point pressure points for wringing a mop head assembly.

Flat mops and self-wringing flat mops can include a wringing configuration for applying a linear wringing motion to a mop head assembly, such as may occur along an axis coaxial with a handle. Four-point self wringing configurations may include four-point guide surfaces and/or four-point pressure points for wringing a mop head assembly.