I recently was gifted a Wismec Motiv vape from my mother. I think it was her newest attempt to help me quit smoking, lol. I've been using it though and haven't smoked a cigarette in almost two months. My problem is that when I order the atomizer heads for it they don't work half the time. I've gone through the troubleshooting page on the site I can get them from and it tells me to gently raise the center pin with a paperclip. After doing that the head will work but I can't fully tighten the top cap or it stops working again. Is this a common problem with this kind of unit or is it mostly user error? Any help would be greatly appreciated.