How To Chemical Clean VIDEO HERE Step by Step Fill a small bucket with warm water, and add one teaspoon of chemical cleaner from under the counter Remove the portafilter from the machine then remove the filter basket using a spoon and place the basket into the bucket Replace the filter basket with the solid one on top of the and place half a teaspoon of chemical cleaner into the basket Place the portafilter back into the machine and run it for 10-15s  Remove the portafilter and, using the small black brush under the coffee machine agitate the chemicals in the basket Using the wet chemical covered brush gently scrub the underside of the group-head and inside the seal Replace the portafilter and let it run 8-10 times for 10-15s Empty the portafilter and then continue running the machine and emptying the sediment until the water runs clean  Remove the solid basket and place the empty portafilter into the bucket of warm chemicals Repeat above steps for the other group-head and then place the solid basket into the bucket as well Empty the bucket and put all parts through Günther then replace them in the coffee machine Put up a sign telling tomorrows FOH team to pour out the first shot from each group-head  (If you do this immediately it'll undo all your hard work!!)