Yesterday I loaded up my useual 3 PV's with my cato/tanks. One filled with HHV serendipity, one with HHV Moca Java Smooth, and one with Nport. The Shinney Penny with the serendipity also had an anodized drip tip on it. Noticed on the way to work (50 min drive), it started to taste off. Not bad just not right. On the drive home, it started to taste like metal. Ok drip tip, I've found that I really don't like the metal drip tips like I thought I would, expecially since it got colder. Get home and swap it out for a Plastic drip tip. Take a nice long vape. OMG that is nasty. Burnt carto. NP I'll swap it out tomorrow. Grab another tank with HHV Pirates Booty. Set the Provari to proper voltage. One vape and OMG another burnt carto. Ok know what I'm doing tomorrow,(today). Grab a tank of RY4 and same thing. Bunt carto. Three in one day. These were not fresh filled carto's. They range from about 4 days to around a week and a half. All the rest of the carto/tanks are fine. Ok your gonna ask what brand. One laser drilled boge LR, One self punched boge SR, and also an Ikenvape Platinium. I think my carto's followed the end of the world thing. Just a day late. Well at least I can swap the carto's out and not lose my juice now. Things you learn over time and with a little help from my friends. And I've been so happy with not burning my carto's. Part of the life journey we all take.