When the EPOC+ is not in use, it is best to remove all the sensors or at least the felt pads and place them in the provided hydrator pack. The pack should be kept open to dry out. Wet sensor assemblies left in the headset will corrode over time and you don't want this corrosion to take place because it will damage the headset. The corrosion is caused by the saline solution reacting with the coating that we use to improve the signal quality.
We recommend that you soak the felts well to ensure good contact quality. You can place the felts in the hydrator pack but leave the sensors fitted to the frame.