Sorry to hear you are having issues Insoptivos. Welcome to the forum! Hopefully we can get you happily vaping soon!! Good thinking on the rubber spike! I didn't even think about that! The prefilleds are a little dryer than ones you fill your own. But they should be filled enough to vape. Do you mean that you can't really feel the vapor when you draw on them? That may have to do with the nic level. Nic does provide throat hit (TH) as do a few other things. Are you using auto batteries? A passthrough? It is ok for the wire to show at the top (mouth end) of the carto, completely normal.
How long have you been vaping? Hours? Days? Minutes?