Not sure if this is a battery, carto, or tank issue so don't know which subforum it goes under......I'm using a Smoktech DCT w/ a smoketech carto. Just now I noticed vapor coming from where the battery connects to the carto. I haven't noticed this before. I tried it on two different batteries with the same resluts. Is this normal and if not, what do you think the problem is? The carto? I just put in a new one yesterday. Thanks!