Operate the machine with water only for at least 3 cycles (3 full tanks of water).
Fill the jug with fresh clean water and pour it in the water tank.
Make sure the filter holder is empty. Remove any coffee paper, pre-ground coffee or coffee residues.
Switch on the machine and allow all the water to run through until the tank is empty.
Repeat steps 1, 2 and 3 for a second rinse.
Repeat steps 1, 2 and 3 for a third and final rinse.