Any atty is a better set up then trying to use a carto. I use either a 510 or 306 atty for taste testing and have a bottle of 50pg/50vg mix for cleaning between flavors. Just put in a few drops of the 50/50 and blow it out, several times and your ready for the next flavor.
Note: I dry cartos on a cookie sheet in the oven on the lowest setting (175)