Abstract: A cleaning apparatus for generating a pulsed liquid stream, comprising a fluid tight housing having a cylindrical side wall, and first and second ends being compact enough to be hand held by a user. A piston mounted in the housing forms a liquid tight seal with the sides of the housing and slides between a first and a second position in response to an actuation means operated by hand pressure. An output port in the second end of the housing is connected to a nozzle for directing liquid at a desirable location. A liquid control means connected between the output port and the nozzle receives pressurized liquid exiting through the output port and transfers discrete portions of the liquid to the nozzle forming a pulsative stream of liquid exiting the nozzle.