No problem jp, I'm always glad to help whenever I can. Smoketech atomizers are just ok to be honest with you. They're like the generic kind. Like Bauways for example. Not really a fan of those. If you were to go with another cheap atomizer. Then the Joye LR 510's are just as good as some of the premium 510 atomizers out there. Good flavor and everything else. Although, you have to get rid of the primer first.
Anyways, yeah it's your juice since it's a straight caramel. Never ordered from Heavens gate and so, I don't know how strong they flavor they're juices. But, those types don't do to well in low ohm atties due to the sugar content. Is it dark in color? Because that can gunk your coil up and you'll be getting a baste taste/performance from it.
I would highly recommend you getting a different juice for the time being. Well, until you get a hang of things. I hope caramel is not your favorite. Since it isn't going to do well in cartos neither. Since it has sugar in it and will clog it up as I've mentioned earlier. Also, your filler material is going to retain a lot of it. Which wicking issues as well. Meaning the juice won't get to the coil fast enough and you'll be getting a bad vaping experience. It also effects flavor.
I mean, you can get a few days in it or a week if your lucky but, then you have to either clean the atomizer or throw away the carto. Depending on how heavy you vape. The good thing is that 70/30 does really good in cartos in general. Just make sure that your juice isn't really dark or has a lot of sugar in it.
Hope that this isn't to bad for you. Since, it's going to be the same way whether you use a bottom feeder or not. The juice is pretty important and it effects the performance of either an atomizer or cartomizer in the end.