I had one issue with this on my EVOD. It was the coil not screwed all the way down. I also have another time that I contributed to overfilling and not paying attention. I just put a paper towel under it and blew until it cleared. If this doesn't work then there has to be a crack in the tube somewhere. I have several EVODS and they have been pretty bulletproof. All of them. Sorry to hear you are having issues with them.