Cleito RTA was my first attempt at building.
Sadly, I failed the challenge, no matter what wicking method it would flood on me when refilling then leak through the air holes. My advice if problems persist and its your first attempt at building is don't let the experience sway you. Immediately after my Cleito building deck, I moved to a Griffin 25 with absolutely 0% issues, none, nada, zilch.
Basically, I don't find the Cleito RTA section a pleasurable beginners experience. Others have no issues (and that's fine) more power to them.