Abstract: An improved cleaning apparatus adapted for use in removing residual material such as toner from an imaging surface of a reproducing machine. A cleaning element is supported for rotation about a given axis and a housing is arranged about the cleaning element. A vacuum air flow is created through the housing and about the element in order to collect the residual material removed. The vacuum port is arranged at one side of the housing. A baffle reduces the asymmetric variation in air flow caused by the presence of the vacuum port at one side of the housing. The baffle comprises a plate-like member which extends parallel to the axis of the cleaning element and is inclined away from the cleaning element transversely of the axis.