Right now I'm vaping mostly light juices like Honey Beez and Dulsis which I think are 70% pg 30% vg. This seems to be a a good mix for cartos. Darker juices with higher vg seem to not work as well in cartos.
I'll try the method of alternating a few cartos at a time.
Not sure why this would work better than using them until they're longer working. Do you have any ideas of why they would last longer if alternated?
Maybe it gives the coil a chance to cool off or you aren't putting juice near the hot coil. Just a guess, no clue really.