I am the guy who on FT forum was once writing a thread how my Dvarw leaked like crazy and is very finicky with wicking - this was when I just got it and was not familiar with it. I came from Kayfuns.
It took me a lots of troubleshooting and experimenting with wicking to find what was wrong: The key is that the Dvarw needs more wick than I used with the Kayfuns. (With the Kayfuns, I always stripped off top and bottom layer of cotton after I cut the piece). With the Dvarw, I just cut my strips from my cotton sheets (about 0.7cm wide or so) but I do NOT strip, so I use more cotton. (If it's too thick in the beginning, twist the cotton so it fits through).
And then wick just like they show in the pics above, exactly like benley73 does. Make sure to tuck it down at the two ends, and make sure the holes on the side are COVERED. (I have reason to believe that the Dvarw V1 with the smaller, round holes may be less prone to possible leaking as the holes are smaller). But anyway, if you do it like that, it will not leak.
So yes, TLDR: Use MORE cotton. But also don't make the ends too long, and also not too short. Again, like benley74 or Tony does above, it's perfect.
(I am usually tucking straight down, but you can also fan it out a bit so that there are two "half moons" like Tony has it, essentially covering the two halves with cotton)