An electrode with a magnetic connection is used with the Cefaly. One regular electrode can be reused up to 20 sessions (recommended number of uses for Blue Gel electrodes is 10).
Before applying the electrode, the skin on the forehead should always be cleaned and degreased thoroughly with soap and water. As long as the electrode adheres well to the skin on the forehead, it can be used.
Once the session ends, the electrode should be stuck back onto its clear plastic backing sheet and stored in its pouch.
Do not leave the electrode unpackaged in a dry place. It will lose its hydration and will no longer function properly. A few drops of water from the tap on the electrode gel will rehydrate it and help prolong its use.