Do not immerse the TensRelief / PulseRelief units in water or rinse them under the tap. Do not immerse the electrodes in water. Clean the charger, and the units with a damp cloth and a mild cleaning agent, e.g. dishwashing liquid. You can also clean them with 70% isopropyl alcohol (IPA).
Do not use any other cleaning agents than the ones mentioned above, as these cleaning agents could damage the material, e.g. cause loss of gloss. If the electrodes are dirty, put a drop of water on your finger and gently rub the dirt off the surface. Do not use soap or alcohol to clean the electrodes.