I am only little more than a week or so into dripping myself, but I sympathize with this experience!
Sometimes it is hard to tell if the battery is low, the juice is weak, not enough juice, too much juice, or an atty going bad. I recently found that one of my atties went bad - I tried all the cleaning methods recommended on this forum, put it on a freshly charged battery, and it still produces very weak vapor, so I ordered a few spares. I don't know if it went bad because I flooded it, didn't keep it wet enough, or a densely flavored chocolate ejuice killed it.
Now that I have all fresh atomizers, and keep my batteries charged in rotation, I just drip 2-3 drops, vape for about 5-6 good draws, then add a few more drips, etc...Now everything seems to work very predictably.