hard to say without actually seeing it. it could be caused by a multitude of things such as the o-rings not creating a proper seal, overfilling the carto in the first place, to the holes being too big if you are using thin juices (50/50 doesn't necessarily mean that the juice is thick) or the carto just being plain bad. i've heard from others that once a carto has started flooding that the problem will never go away.
my carto did start flooding after about the 10th time i refilled it; I was able to "fix it" by taking the whole thing apart and blowing out excess juice, but it finally gave out and only by swapping out a new one, did it fix my flooding issue. i would suggest putting in a new carto first with slightly smaller openings. if it doesn't flood, but keeps giving you dry hits, just make the hole a little bit bigger until you find that balance.
Ok well I got one last week and I got my provari today was waiting to use it till I got my provari. My issue with this is that it floods my carto like CRAZY. I take a vap and I just watch the juice level go down. I than get a mouth full of juice that I almost got sick. SO what do I do to have this not suck the juice up like this? I use a 50/50 mix. Any help would be great put this aside for now till I can figure it out dont want any more juice in the mouth.I think it is the 2 holes punched into them that it gets to much juice.Any tips would be great guys.