Simply open the top of the Espresso Machine and remove the water tank.
This customer in particular used bottled water in their machine which caused a Calcium Build up in the water tubes. We highly recommend using tap water to avoid this issue.
As you can see in the video, the Floater Device and the cap were separated. These two pieces should always be attached and in the proper position in order for the machine to function properly. It is important that the magnet on the Floater Device is touching the bottom of the Water Tank when placed in its proper position for this magnet indicates to the machine that there is water in the tank.