Abstract: The disclosed hot water extraction cleaning machine employs a conventional canister-type wet/dry vacuum cleaner having a suction tool communicating through a wand and a suction hose to a recovery tank in the vacuum cleaner. Hot cleaning solution, held in a supply tank or reservoir mounted on the wand, is pumped under pressure to a spray nozzle, positioned adjacent to the suction tool, in order to spray a jet of atomized cleaning solution onto an area of the carpet material or floor material to be cleaned. As the operator draws the suction tool across the sprayed area, the cleaning solution, with entrained dirt from the material, is sucked into the recovery tank. A hand-controlled valve permits the operator to control the flow of cleaning solution to the spray nozzle.