The CES earclip electrodes have little clamps that you must fix on your earlobes. If you are wearing earrings, it is advisable to first remove them. Before clipping the electrodes onto your ears, wet the little bits of cloth with tap water. Salt water is best, but tap water works just fine. If the cloth is dry, there will be no or poor contact with the skin and no treatment will occur. If the electrodes are only partially wet, the contact surface will be reduced and you could feel a stinging sensation in your earlobes. The white ear felts are for comfort only – you can also treat yourself without them, the efficacy of the treatment will not be affected.