I've just been having a real hard time with this. The full strip of cotton bacon seems just slightly larger than the shoestring provided. I even tried taking tiny pieces of cotton and stuffing it into the hot spots around the edges. I guess this is just a novice issue. I've never used a mesh RDA. Also the squonking action seems to prefer one side over the there. I even tried it without any wick and the majority of the juice goes to one side.
Squonking should flow freely from the center pin onto the ceramic plate. When full with cotton, it will saturate from the bottom and if the cotton is not too thick, you should see this seep through the mesh. If not, the cotton still gets saturated but the juice may pool to the side. Keep in mind there is A LOT of cotton there so it takes a little more effort when squonking.
If there are no voids between the cotton and the mesh, and it is fully saturated you should not experience dry hits. I can get ~20+ hits out of a fully saturated wick.
What power are you running at? And is your mesh perfectly formed? Any dents, dings or creases will result in a dry hit.
I would look to see if your mesh is being clamped evenly. Any dirt or machining defects with the clamps could result in part of the mesh heating up quicker than the rest.
I use 1/3 of a Muji pad to wick. Remove the harder outer layer, lightly rolled and threaded through the wick. Just cut the edges in line with the deck and tucked into the juice well. No thinning!