I agree, also too much wick stuffed in there will raise the level of juice in the chimney just threw wicking action, the level might be high enough to start flooding. I never use the valve to fill my Kayfun and at most I'll get 3 or 4 drops of juice in my collector. The only time ill get leaking, is too much wick and or coil too high above air hole. If you think about it, the way the kayfun is designed, your wicks don't have to move juice very far, you don't need tons of wick in there. I use a mini coil with a 3/32 hole with a single rolled cotton wick. I have 0 issues with wicking.