Need Help!! Having trouble getting Hellfire Mini up and running :(

[Roobs]

I have several Genesis atty's and enjoy them alot. After being on the Hellfire list for a 1.5 yrs ,I was able to get one. I have tried different meshes 325,400 & 500 and haven't been able to produce a whole lot of vapor. I usually vape 28awg kanthal with 500 mesh with great results. Can anyone give me the size mesh they use on the Mini Hellfire ....It's driving me crazy that I can't get this atty singing Thx