Device for cleaning an espresso machine

A device for cleaning at least a group head of an espresso machine, the device comprising:

• a cylindrical body having a top and an opposing bottom, wherein there is an opening at the top, wherein the bottom has a bottom wall including a retaining wall extending upwardly therefrom, wherein the body has an interior cavity and a plurality of wedge-shaped tangs configured to removably attach the device to the group head;
• a piston slidably disposed within the interior cavity of the body between an up position and a down position, the piston and the opening of the body at the top defining a variable volume for holding a cleaning fluid for cleaning at least the group head of the espresso machine, wherein the piston includes a top and a mating base, and wherein the mating base has a base lip extending downward therefrom;
• a spring disposed underneath the piston for biasing the piston to the up position, wherein the spring is seated within the body by way of the retaining wall and the base lip;
• and
• wherein the body further includes one or more grooves
• cut within a sidewall of the body and one or more outlets wherein the one or more grooves extend to the one or more outlets, so as to permit the cleaning fluid to exit the body via the one or more grooves and the one or more outlets as the piston moves to the down position.