How to use Smok Dual Clapton OCC

[wuiayi]

Hi. So I'm using this dual clapton coil from the TFV4 mini. I run it on an Evic VTC mini on 70w but I didn't even get much vapor. I have to puff for around 2secs just to get some. Am I doing something wrong?

Here's what I'm using:
TFV mini using dual clapton occ
Evic VTC mini 2.0
Smurf battery