I've tried a few different vendors of c4 types, and thus far my favorite has been myfreedomsmokes version with the pretty colors. they have an extra airhole draw so it's an easier vape than the others i've tried, and they do dribble a smidge sometimes but not enough to stop making vapor or gurgle. whenever I switch flavors I use a qtip. I carry a few in my case and wipe down battery post a couple times a day seems like.
What helps as well i've noticed is only fill to 1.6ml, not all the way, and they don't like to be manhandled. some days the ones I got from MFS don't do anything but leave a condensation mist on battery - where the other brands I have leave pools and gurgle and stop working until I take them apart, blow out the excess and swab out battery.
I'd agree evods, t3, vivi novas, etc have this issue less, but also have other issues.
Right now i'm tasting a LOT of juices and I go through juice slow. I have mostly c4s in rotation and a couple evods/vivi novas for juice I know I like
