I have been using EVOD BCC for 3 weeks. I have one filled with menthol that I do not like too much, but it always works great. My other I have been using vanilla. Sometimes it is fine, sometimes it leaks, and now it doesn't seem to be working at all. So I am using the menthol one but it is only 6 mg and I like the vanilla better because of the taste and that it is 12 mg nicotine. The vanilla is 50/50 pg/vg. Not sure what the menthol is. The batteries are is ego C. So this last fill the battery doesn't seem to work on it. I tried the battery on the menthol and it's fine. Then I tried the battery from the menthol on the vanilla one and it doesn't work either. I also changed the coil on the vanilla. Don't know what else to try. When I push the button down it sounds like gurgling and then when I draw I get yucky stuff in my mouth. So right now I am felling very frustrated. If anyone can help, I sure would appreciate it.