Youre not the only one.
same thing happened to me when I got mini PTII. I got/get juice in my mouth, in the batt, and a gurgling on the draw. I watched a vid on YT, and a guy suggested putting an extra little oring on the coil head, so I tried that.....and it improved both things a bit. I must say, when I was using the Ego type batts, it leaked a lot more, but when I changed to the MVPII, for some reason it improved. (hasn't dripped into batt since). Not sure if it was just a fluke thing or what. But It is a fussy tank, which is really too bad because when it works, it is really great. Plus from what I have seen, it is the only higher quality tank that you can get at that price point, unless I am missing something! I got a carto today, so we'll see how that goes instead....
I noticed you need to make sure that the larger orings on the bases of the tube, need to be correctly aligned as well. I cleaned it once and the oring must have moved a little when putting together, and it leaking badly.