I've read through the other threads about issues people have been having with the Smok Tech 1.7 single coil cartomizers, and I have a couple of questions. I've now used all 10 of these cartomizers, and have had issues with many of them. The first two worked great. Then I had one that tasted burnt, but I thought that it could be that I didn't wait long enough for the juice to soak in. So I started filling them and letting them sit overnight. I made sure that they were completely filled, but I keep getting a burnt taste from the first draw. One cartomizer would short out the battery when I tried to use it. Am I just having extremely bad luck with this batch, or can anyone think of something that I might be doing wrong? I'm using juices with 80pg/20vg or 70pg/30vg, so thick juice shouldn't be an issue. I haven't had these issues with any other cartomizer, even the cheap generic brands that I have bought. I'm feeling pretty frustrated because of the money wasted on these carts, and all the juice that has gone to waste. The supplier that I purchased these from only guarantees against DOA, is the issues I've been having count as DOA, and has anyone had luck getting refunds or replacements from suppliers?