I haven't had a coffee flavor crack a tank yet. In fact, I've never cracked a tank using any flavor and I've been using the Stardust type clearos. I did just get one mini Protank and am liking it a lot so I'm going to switch over to those on my Egos. I've had my Halo sitting around for over 2 months, though I didn't steep it. I got hooked on Mudslide and couldn't stop vaping it so all my other juices have been sitting around for a while. I'm only now getting a chance to try them.
I only use Morning Vape in my metal mini vivi novas. I think most coffees are tank crackers. They are dark juices. On the Halo juice, my second juice ever was Halo's Shamrock, which is a chocolate mint. At first it was all mint. A week later, the chocolate was there, especially at around 4.2-4.8 volts. Don't give up on it yet. Halo's flavors are complex and take a bit to meld together.
i hate to be left out of the cracked club!

