I slotted a carto for the first time and I'm pretty sure it went as deep as in your video. It sure looks like some of the filler gets cut along with the metal. I put in jokesmoke, which is very lightly flavored, and gave it a long time to soak in.
We tried vaping it and it had this rather strong grinded metal taste....exactly like the carto smelled after slotting....
We tried to slot two more.....being as careful as we could to just barely pierce the metal and not go through any filler. It turned out a little better, but still had that unmistakeable, rather unpleasant flavour....
Even now, several hours later, I can still taste it in my mouth and nose....
Are we doing something wrong? How do you avoid this flavour?
To be honest. Not sure. I've never had this issue. Perhaps you're slotting too deep?
What carto are you using? What equipment are you using to slot with?