Hi,
I found the part and replaced it. The camera has worked fine ever since.
The part is called SIDE LEFT (FPC)FLEX CABLE Part number LSEQ0556A and can be purchased from http://www.pasc.panasonic.com/epartr/ for $24.10 It is actually part of the power switch flex cable. The part comes pre assembled with a new power/record switch. The dew sensor is "painted on" the flex cable and looks like a black letter "E" you really don’t need to know that though. Just install the new switch and the DEW DETECTED will go away.
Good Luck
Ray