I bought a subox mini. This is what I'm referring to with the leaking.
Few things to try..as I had problems too at first..
Don't drip juice into the top of the coil as everyone does, it isn't needed and can do more harm than good, i'e, flooding..
You really don't need to pull hard on the Subtank Mini or it can flood
Use a Q tip to clean it after you take a few vapes..when first filled.
I think you may have over primed the coil, a few drops in the juice holes (which goes against the grain) and let it sit in the tank for 10 mins is enough, start on a lower wattage.
I vape 60pg 30vg in mine (the only tank I vape a higher pg in, I make my own) and it never floods.