Many hardcore e-smokers "drip" or dry smoke. I do. I also get tired of taking the tip off, dripping, replacing.
I would love it if a cart could be created where you can fill up a reservoir with e-liquid, no cart fiber what-so-ever. Reservoir holds about 1 ml of juice or so.
Then, you hold the unit downwards, and press a button, like clicking a retractable pen. Each click releases one small drop of liquid onto the atomizer, as if you were using the eye dropper from a bottle. Smoke, repeat.
That would allow you to drip, while only needing to refill a couple times a day.
So, if you are a manufacturer of e-cigs, DO THIS

Thanks for reading.