Haven't used the Liquinator for a few days. I've been in a bit of a daze over what flavours I want to use and all that. Anyway, on the weekend I decided to use some old juice I have had laying around. It was a doubler mixed with niquid but I mixed it over 4 months ago.. So by now it had become quite dark and thick. When I was putting it in, the DC carto sucked up the juice quickly and then I found it gurgling a little.. I thought, "Oh no! It's going to be a leaker!" but after a little while it got back to being a clean draw and wicking normally. Now it's day 2 and it is wicking perfectly still with no gurgling, even after laying it on its side overnight.
So even with thick, dark juice that would probably not work so well in a carto by itself, it seems to run fine. Great flavour, great vapour..