Abstract: The invention concerns a method of removing soil from a surface, comprises the steps of:

Abstract: A water spray has a nozzle (6) for carrying a pressurised flow of water to an outlet (7) thereof, and a conduit (12) surrounding the nozzle outlet (7) for carrying a flow of gas contiguously around the flow of cleaning liquid exiting said nozzle outlet (7). The ratio of velocities of gas and water immediately downstream of the nozzle is in the range 0.5 to 2. This enables good control of water droplet size in the spray, to a volume median diameter in the range 0.5 to 2 mm at 1 m from the nozzle. Low water pressures may be employed in cleaning using such a spray.

Abstract: Improved compositions which clean a surface and are believed to deposit thereupon a layer of cationic surfactant which assists the release of soil subsequently deposited upon the said surface comprising surfactant, wherein said surfactant comprises:a) at least 65% wt on total surfactant of nonionic surfactant,b) less than 1% wt on total surfactant of anionic surfactant, and,c) 0.1-35% wt on total surfactant of a quaternized polydimethylsiloxane, preferably one which comprises a cation of the general formula:?R.sub.1 R.sub.2 R.sub.3 N--Z--?Si(CH.sub.3).sub.2 --O!.sub.n Si(CH.sub.3).sub.2 --Z--NR.sub.4 R.sub.5 R.sub.6 !.sup.2+wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently alkyl or hydrogen, Z is --CH.sub.2 --CHOH--CH.sub.2 O--(CH.sub.2).sub.3 -- and n is 1-200.