Congrats on switching to
vaping and welcome to ECF. 19 days is a long time for one blu cartridge, certainly. I hope you do have some replacements on hand in case you need one, since you've made such a great start (although, they certainly aren't hard to obtain.)
How much are you
vaping and how much were you smoking? That is a lot of life out of one cartridge. With that said, if it's working, it's working! And it's fantastic to become a vaper, however that is accomplished
Welcome
Anna