What PG/VG did you put in them? And I wouldn't buy them there - they don't even say exactly what clearomizers and rev they are. If they are CE2 those often need the inner seal modded or reversed to wick right. And here's a hint about ecig stuff - if it looks like the coolest thing ever it may still work like crap or require
mods or tinkering to work, especially if it's clear.
And I recommend not ever buying cartos without knowing exactly what they are and what ohms they are. On a slim ecig you should be using no lower than 2.5 ohms. Anything lower is for fat
batteries 450mah+ and mods.
And clearomizers work best with 30% VG or less