I have dry skin, and way-back, I originally tested 'live' (power) connections with the back of my fingers!!!
Although that's true, I just want to say that people should not forget about usage of certain 'old-fashioned' analog
meters! There are many times where a 'dampened' needle is needed, instead of a fluctuating digital read-out, that is
hard to follow. And, depending on the 'Meters' actual "Ohms-perVolt", affects the actual 'Load' if any, or actually creating
one when it is actually needed!! Also, regarding RF interference, I've seen 'Digital' devices/meters/indicators that have
gone berserk when close by transmitters like 'Walkie-Talkies' are in use!!! Keep the 'old-stuff' at hand !!