I usually top off w/3 or 4 drops about a half dozen times or so if I'm sitting around puffing the thing all day. I've smoked the KB almost constantly, but that's with lower juice.
As for your comment Rusty, you're a bit off the mark. I used to smoke (about 3 years ago) and walked away from them with no problem because I didn't like the effect on my lungs. I certainly don't intend to demean anyone because I think it varies from person to person, but IMHO I think that "needing" nicotine is simply a state of mind. I did not suffer any withdrawl symptoms nor did I ever relapse with analog cigs. I enjoy the feeling of a nic "buzz" and now that there is a way to get that without getting winded after a few pull-ups, I'm simply taking advantage of that. If I forget my ecig at home when I go out, I simply have the self control to wait until I get home...it's not a big deal for me. If I start to experience any shortened endurance as I did with analogs, I'll simply give quit and give my devices to my wife who would still be smoking regular cigs anyway if not for these.
Way to judge though, I'm impressed.