I got some cartridges and an atomizer for a 510 and thought it would be a good idea for testing flavors. However after watching several videos it seems like the cartridges do not absorb the e-juice correctly. They soak in quickly on the videos. On these the e-juice pools on the first drop. Is there a need to prime them somehow? I took a paperclip and poked some holes in the filling but it seemed to help only minorly. My thinking these might just be duds?