About 3 months now since I first started vaping. Switched from 1+ packs a day directly to vaping. All my products have been from Vapor4Life. There had been never an issue with the cartomizers, up until a couple weeks ago. I could only imagine that Vapor4Life have switched to another type of cartomizer even though it looks the same. I am surgical when it comes to priming and preparing my carto for first time use. I have wasted so many already because within the first hour of vaping, they go bad. I know I am not doing things different than before. So, I purchased 9 cartomizers today, first 2 failed, now im switching things up on how I feel my cartomizer up. This is very frustrating. My faith in Vapor4Life is dwindling away.