of the rows 8 9 in the embodiment illustrated in fig1 the cleaning elements 40 50 60 may comprise cylindrical brushes rotating about their respective longitudinal axes that have radial or almost radial individual bristle parts alternatively cylindrical bodies having a foam material covering may be used such as shown in fig2 at 70 cleaning element 70 comprises a foam covering 19 that is applied onto a driven roll type inner body 21 to exert a cleaning wiping action on the periphery of the guide roller 20 not covered by the fabric web 10 with this type of cleaning element the lateral nozzle 18 lies outside the vertical plane passing through the axis of the guide roller 20 and sprays as shown in fig2 from the right into the wedge shaped space or gore formed by the guide roller 20 and the cleaning element 70 the cleaning elements 40 50 60 70 are elastically flexible at their circumference such that they can be moved past the guide rollers at a distance that is a little less than the distance that corresponds to the sum of the radii of guide rollers and cleaning elements the circumferential speeds of the guide rollers and cleaning elements may differ to produce a marked scraping or wiping effect in the embodiment of steamer 200 shown in fig3 nozzle arrangements 80 are provided instead of the rotating cleaning elements 40 50 60 70 the nozzle arrangements 80 are movable by the respective drive chains 16 17 and 19 along the rows 8 9 of the guide rollers 20 30 in the same manner as the cleaning elements 40 50 60 70 the nozzle arrangements 80 comprise.