Trouble coiling or wicking? The coil screws are the same as a Kayfun although the one's in the Fogger - at least mine - were a little more difficult to trap 2 wires with. I had some M1.6 - .35 X 3 stainless that I bought at Amazon for Kayfuns that worked better. For wicking I use cotton. What worked for me was trimming the tips to a bit of a point and just barely starting them into the channels. I've been running 85% VG juice in it with this setup with no problem.