The Electrode Pads, including the ‘ePlus LongLife Pads’ do require periodic replacement. However, it is often possible to extend the life of the pads by simply rinsing them under a cold water faucet (no soap is required), shaking off the excess moisture, return the pads to the clear plastic cover sheet or the plastic holder (ePlus LongLife Pads only), and then place the pads in the refrigerator overnight (not the freezer). This should restore the adhesion of the pads. If it does not, the pads are worn and should be replaced. Contact your nearest OMRON retailer to obtain these.