My friend just got a stainless steel stingray mod by hcigar. he has a kayfun 3.1 RTA by hcigar on it. he screwed the top cap on extremely tight and won't unscrew. tried using pliers and still won't work. My main question is why is it leaking inside his stingray tube on the battery? I have tried searching google and can't find a solution. I have a brass stingray by hcigar and i have no problems whatsoever. any help would be much appreciated.