I have been recently contacted by a customer who has been seeing large spikes in her power bill. She also has a GFCI that is giving her a problem. - She has contacted the power company to put in a request to come and check the meter. (I believe she also said the power company admitted her usage was not within the normal cycle or range.) She says she has gas heat and a gas hot water tank. Any ideas here? - I'm just looking for some input that might give me a head start on what to look for or where to begin before I actually arrive. (She is scheduled for the 19th.) Any recommended troubleshooting techniques or ideas? Thanks in advance.