Does anyone else have problems with the ACC socket? Mine does not supply a constant source of power, it starts off feeding 12v, but soon it just dies. I have to pull it out, wiggle it around and even then 1/2 the time I can't get it to work. I have tried two different brands of power sockets and the same thing happens, it also happens with my Garmin power tap as well as the one for my phone. Is this unique to my car or have others had this problem?