I think the trick is to pre puncture the caps so a clean hole is made. I too am on day 2
vaping and one
tank leaks, even after changing caps. I think letting the wick puncture it isn't clean enough. Looking at mine, one atty cut it nicely, the other is not clean at all. Mine are silicone. I think with the atty needles, some may be "clean" and some may be rough on the cutting edges.
Solutions I have seen: use a 22 gauge hypo needle that is blunt and place it on the hole membrane, rock it back and forth until the membrane is cut cleanly OR find a brass tube (like from an old pen cartridge) the right size and do the same after you sharpen it with a needle file inserted in the tube and rotate the tube.
I have ordered body piercing needles from ebay to do the job. Just need to blunt the sharp parts with a file and good to go. I think I will even insert the needles into some wood dowel with superglue so I have nice little tools for the job.
BTW, I love my eGo-t better than my dual coil mega carts. When the tank doesn't leak, it is very miserly on liquid and good vapour prod. The Carto flavour tastes funny and it's easy to over fill it since I'm a noob and worry about drying it out.