A washing apparatus includes a nozzle having a liquid inlet to which a liquid pump is connected for supplying a wash liquid under pressure thereto. The nozzle has an outlet for discharging the wash liquid. A hollow sweeper member is connected at one end to the outlet of the nozzle for discharging the wash liquid in a jet from the other end. The sweeper member has at the other end a sweeper portion comprising a plurality of flexible strips peripherally mounted around the other end whereby the flexible strips are caused to flutter when the jet of wash liquid is discharged from the other end.