Just thought I'd share ..
Came home tonight and it was time to fill up the 6ml tank. Grabbed my juice, pushed back my carto a bit then paused..... This is where it went all wrong I thought Hey self, instead of dripping through this little hole, why don't I remove the top cap and just pour it in? OK excellent idea!.. This is point where I should have thought this through more... NOPE. I then proceed to remove the top cap and pushed the carto back into its original place. I filled the tank like a breeze and was thinking, this is so much faster and easier! I then grabbed the top piece and pushed it back on. Then proceeded to watch half of the juice I just poured in shoot through the top of my carto from all the pressure that I created. I forgot about the 2 little holes on the bottom of the carto that all my juice was quickly forced to go through. Way to go me... way to go