I couldn't find all the other threads. sorry. I have now had 3 boxes containing 15 duds in a row. you used to not even have to prime them. obviously they had production issues or cut quality. so now you have to prime them. or you get acrid burnt metal. on top of that some were doa the others quit completely in 5ml or so. dangit! I thought folks were just using them wrong. I have now witnessed this. trust me. I am the self proclaimed bvc king. I normally use about 6-8 a week when they were good! one actually shot fire out of the drip tip! that, is real bad news. glad I was priming it and that was not in my mouth.