I fill water tank and heat up machine, then put disc in pf without basket with teaspoon of Caffetto, then with plastic container to catch water run brew switch until it hisses then let water and dross drain into container, I repeat this about 6 to 8 times until it is clear water coming out, I then clean bottom of group and seal with brush and run more water through, flush out steam valve and run water through group and steam wand. Refill the tank and I"m ready to go once more, plus I clean bench area and machine casing etc. Probably takes about 30 mins after machine has heated up. I do it every Saturday as a ritual so that I dont forget!!