On conveyors where the cleaning systems are positioned so the material removed from the belt does not freely return to the main material body, a dribble chute, or fines chute, is usually required. This is a separate part of the discharge chute that directs the removed carryback back into the main material flow. This auxiliary chute must be large enough and designed with a steep enough wall angle to ensure the material falls away from the cleaning system and prevents the encapsulation of the cleaner in these sticky materials. It is advisable to install a dribble chute with an angle as near vertical as possible and to line it with a low-friction material such as Ultra-High Molecular Weight (UHMW) polyethylene. It may be useful to incorporate flow aids to help in moving the carryback material away from the cleaners.