Yes, if the juice was conductive you would short the device every time you put some on the coils
Juice can gunk up the works and make sh..stuff sticky but it is NOT going to short anything by itself
I never said it was conductive. You should look inside a mod. You'll find steel, copper, brass, aluminum, solder/solder acid, silicone, plastic, rubber, possible dielectric lubricant, capacitors, switches, micro boards, and other electrical components.
In juice you can find pg, vg, (water) flavoring (alcohol) citrus (tank cracker), and a whole bunch of stuff to gunk (sweetner), collect dust, cover small stuff, including air holes for ventilation, remove protection, or react with the compound.
Juice doesn't have to be conductive to harm a mod. It can cause over heating, resulting in failure. It can react with any of the compounds in the mod causing a failure.
So I'll just stick with "It's safe as long as you don't spill a drop. Juice and the internal electronics don't get along, you'll end up frying something. Keep a paper towel handy."