With a LT and a tank, you HAVE to prime the carto with about 30-40 drops of liquid and let it sit for about 15-20 minutes before first use. I ruined one carto by only priming with about 5 drops of liquid - had to pitch it, couldn't get the horrible burnt taste out of it anymore, no matter what i tried. If you prime it well, let it soak a bit, you shouldn't get a burned taste.....

Just putting it in the tank without priming it really well won't do the trick, you gotta prime it really good.