The proper approach in keeping any device workable is to clean it often and according to the instructions given by the manufacturer.
And, it doesn’t concern everyday cleaning of visible parts, since, it’s quite obviously, that it is performed correctly. But it does concerns the deep cleaning that is held not very often.
Daily Using
Once the brewing cycle on the device is finished, machine requires immediate cleaning, otherwise, the next day you will get a surprise. That is why, in many offices there is a rule to clean after yourself.
So, the first thing you should clean is the portafilter. You need to throw away the grind leftovers and rinse under the tap water. The next thing is a steam wand: wipe it with a piece of wet cloth and then turn the dial for a few seconds so the small amount of water go through the wand.
Along with the exterior, the group head also should wiped with a piece of wet cloth after each cycle, thus you will never face a stain of grind residue. However, you shouldn’t use any abrasive cleaners, they will damage the surface.