Well, the vapor is going to be pretty darn warm / hot - that's what
vaping at 5 volts does. Perhaps you're just not used to it yet. ;-)
Regarding dripping on a 510 at 5 volts, here's what I have found to be ideal:
On a totally dry 510 atty that hasn't been used yet (or has just been cleaned), drip 5 drops right onto the bridge.
Once you're up and running, drip another 3 drops as soon as it starts to taste burnt - this will probably happen about every 5-8 drags on your V2.
Hope this helps!