i was wondering the same thing, I have been using juices with considerably more vg in them, my atties dont seem to work as well either, and they always taste burnt, it sucks. i just bought a bunch of samples, and they all taste like crap. but, i posted this question in another section not too long ago, and the general consensus was that vg doesnt hurt the atties at all, in fact some say it makes their atties last longer. I will have to check back and see what the experts say...