Best used one group espresso machine
Number-One Coffee Machine Brush Cleaner Nylon Espresso Machine Brush Coffee Cleaning Tool with Spoon (Pack of 2)BagTu Coffee Machine Cleaning Brush with Spoon Tool Set for Espresso Machine Group Head,Pack of 3,BlackSaeco Decalcifier for Espresso Coffee Machines, 250 ml, Pack of 3For Cuisinart Head Gasket Group Brew ...