Continuing the discussion from Zeo Sleep Monitor:
Jane, my assumption is the wear out mechanism is a combination of dirt and the conducting material being worn off the metallicised cloth. To clean, Zeo recommended hand washing the headband and sensor pad (without the pod) with a delicate fabric cleaner, such as Woolite. When asked by a consumer, they also said a rinse in rubbing alcohol should be OK. Zeo’s 90 day replacement policy was based on the anticipated wear of the silver fabric in the sensor pads. I have rinsed mine in an alcohol bath, seemingly without harmful results, but I’m not sure it did any good, either. I never tried washing in fabric cleaner. You might try an alcohol pad wipe to the forehead before donning the headband and/or a wipe of the pads themselves. Lately, I’ve come to think that a little sweatiness might actually improve the sensitivity of the pads.