Ordered some smok tech XL cartos from Altsmoke, but I've only managed to get a couple of em to work so far and I don't wanna waste the rest of em; I put around 25-30 drops into em and the last two I've filled without flooding seem to either get very little vapor or none at all, even after blowing em out and making sure there's no overflow still on the battery contact. Is this a case of bad cartos, or am I just not filling em enough before using them? I don't want to waste liquid or cartos on trial-and-error if it's a couple of bad cartos in the batch. The first two are working great as long as I keep them topped off and wet, but the second pair just don't work properly so far. Would anyone recommend trying to clean those two out and try again, or should I just ditch em and order another batch?