The Prince rba deck can be a bit finicky to wick. Not bad once you get it down, but a BIT finicky. If you already figured this out, forgive me. Certainly don't mean to treat you like a simpleton.
In the image below, the red square represents the open space behind the threaded ring that holds the chamber on. The posts end right there as you probably already saw.That's where the leaking is coming from. You have to makes sure the whole wicking port is filled with cotton, including the middle, but not too tightly stuffed, in order to prevent juice from making it's way between the wicks and down that airflow canyon.
What can be just a bit tricky is that because of how close the coils are to the ports and how relatively shallow the ports are, you need to trim the cotton pretty short, but not so short that there's not enough to fill the whole port. Trimming and thinning the tails of the cotton might take a couple tries at first. (but mnaybe not too)
Once I've got the cotton in there and primed, I take something pointy and gently spread the the cotton across the whole channel toward the middle.
Sounds like more of a pain than it is.
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