Frequently Asked Questions Can I re-use TensRelief/PulseRelief electrodes? You can re-use the TensRelief / PulseRelief electrodes, but always check them for damage and signs of wear. Please pay attention to the following: Replacement Replace the electrodes when: they are damaged or dirty they have lost their adhesive power (never use plaster or tape to attach them to the skin) the stimulation becomes uncomfortable, i.e. when you experience an unpleasant stinging or biting sensation Expiration date Do not use electrodes whose use-by date has expired. The use-by date is shown on the resealable plastic bag.