Isn't it funny how just a slight adjustment of coil and wick can make a huge difference? I re-wicked one of my KMV3 that had been performing beautifully. After re-wicking, the flavor was muted, so I took the deck off, washed it out, and noticed that my coil was sitting almost right on top of the air hole. Don't know how that happened. Also the wick was a tad on the spare side. So I adjusted the coil to about 1mm above and put in a slightly more substantial wick, and voila! From meh to magnificent! Kayfuns can be touchy! I guess this is why I know several friends to tried them and gave up!