A return roller assembly that is designed for use as part of a conveyor assembly to improve the ability to clean the conveyor assembly. The return roller assembly includes a roller shaft that extends between side walls of a conveyor frame. A plurality of support rollers are positioned along the length of the roller shaft to support a lower run of a continuous conveyor belt. A spacer is positioned between each of the support rollers to define the position of the rollers along the roller shaft. The spacer can be snapped onto the roller shaft and includes a series of standoffs that space the inner surface of the spacer from the roller shaft. A series of cleaning fins extend radially from the outer surface of the spacer and impart rotation to the spacer relative to the roller shaft during cleaning with a spray of water. The spacer can be formed from an extrusion cut to length.