Abstract: An apparatus including a head sprocket having a bore hole with a first oblong shape consisting of first, second, third, and fourth sides, the first side of the first oblong shape parallel to the second side of the first oblong shape and spaced apart from the second side of the first oblong shape, wherein the first and second sides of the first oblong shape are straight, the third and fourth sides of the first oblong shape are spaced apart from each other, substantially perpendicular to the first and second sides of the first oblong shape, wherein the third and fourth sides of the first oblong shape are curved. The apparatus may also include a crank having a crank head having a first surface with a second oblong shape similar to the first oblong shape. The crank head fits snugly into the bore hole of the head sprocket.

Abstract: An apparatus is provided including a motor, a belt that rotates in response to the motor, an extension arm, and a scrub head attached to the extension arm. The scrub head oscillates back in forth in response to rotation of the belt. The scrub head is adapted to allow the attachment of one or more cleaning pads. The cleaning pads may be doodlebug pads. A method is provided comprising causing a belt to rotate in response to a motor; and causing a scrub head attached to an extension arm to oscillate back and forth in response to rotation of the belt.