I just got rid of an electric clock that only ran 20 minutes fast when I slept on the bed near the clock. I would re-adjust the clock each morning and it would be fine all day and only ran fast after sleeping. I ran an extension cord from the other room and it still was fast. I put the clock in the living room and it was fine. Interestingly, if I slept more to the middle of the bed, it was only 10 minutes fast. I gave the clock away and got a new on that doesn't do that. I believe it all has to do with the energy of the person.