My first e-cig was a Super. The stopper in the carts will have liquid on it, it's normal. Like Astrecks said, the atty might have too much liquid in it, just blow it out. Most of the time, it's the design of the cart that's causing the liquid in your mouth. Take a straightened paperclip and push it through the hole in the end of the mouthpeice to pop out the part that actually holds the liquid, it looks like a small capsule. Wipe out the inside of the mouthpiece part with a paper towel and replace the capsule.
Another big design issue is the end cap. Take the same paperclip, put it just a little bit in the hole of the cart where your mouth goes, and pry off the plug. You'll see that there's basically a compartment there. It has a bad habit of storing liquid, saliva, and condensation. I always removed the end caps and threw them away when I used carts. After a short time, I got so fed up with fooling around with carts that I trashed them and direct dripped only. It's doable with the auto batteries, but you have to be careful not to flood the atty, which will cause liquid to get inside the battery and kill it.