I used to have the same problem while driving! It was inexplicable--I'd drip-drop onto the ol' blue foam, take a puff or two, and get behind the wheel. Then, before I'd get a couple of blocks, it'd taste dry. I've gotten around this by filling the reservoir below the blue foam (I use a straw to prop up a blue foam plug) just before work and just before leaving work. That keeps enough juice ready to go for the ride home (and then some, usually).
But there are bad vaping days. And there are good vaping days. On the bad ones, I vape less, but I'm never going back to combustible cigarettes. Like, I don't even smoke one every once-in-a-while. I've been down that road enough times to know exactly where it leads.