I got an ego-t a few days ago and I love it, other than the experience I had today. So it's day 3 with my first cartridge, I first notice that one side of the mouthpiece has had some liquid run into it. That's no big deal, until I started sucking juice in with the vapor. So now I'm thinking that the 7 cartridges that I got with the kit won't last me long if this is any indication, and I'm wondering if I should order a bunch of them. How long do they last people without having to toss them due to leakage through the mouthpiece? Thanks!