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• I suspect the wetness (?and heat) could cause some natural fibre carpets to shrink and I would be cautious about anything with rubber or foam back or underlay as the heat may cause the material to fail over time. Any wet cleaning of carpets, whether with or without heated cleaning lotion (hot shampoo or steam for example), needs to be sucked off immediately to avoid shrinkage, staining and promote drying - to make the area available for foot traffic! I have no experience of this apparatus; only of industrial cleaners with pressure jet spray and vacuum extraction. By Martin Rose - Southampton - 10 April 2014