I have a digital clock on a table next to my bed. Over about a 10 year period I have had to replace it 3 times (because they died). All 3 clocks have run slightly fast when plugged into the same outlet. Each one ran 2 minutes fast every 4 weeks. Also, I have a DVD player in my living room with a clock that does the same thing - 2 minutes fast every 4 weeks. We have other clocks that are fine, oven, microwave and another DVD in my wife's office. Any suggestions are appreciated.