The electronic cigarette Juul was invented as a means to help its two co-founders quit smoking. But it’s surprisingly hard to quit the quitting tool. I found out 27 days ago when I took a final puff of my USB-shaped nicotine vape, which over the past year had become an extension of my arm.

When I first picked up a Juul, it seemed innocent enough: I was out on a Saturday night and I felt itchy for a new vice. At 25, I had made it through most of my life without smoking cigarettes, save for when I was out on the weekends and bumming them from friends.