The invention provides an apparatus and method for use in the treatment of substrates, the apparatus comprising housing means (1) having a first upper chamber having mounted therein a rotatably mounted cylindrical cage (2), a second lower chamber located beneath said cylindrical cage (2), at least one recirculation means, access means, pumping means, and a multiplicity of delivery means, whereby both the apparatus and the method find particular application in the cleaning of soiled textile fabrics.