I had the same problem after I bought most the juices recommended on this forum. IMO atomizers do work good for testing new juices. Just make sure to blow'em out the best u can. The fllavors do carry over some especially menthol (dont use in your tester atty) but after a few drops of the new juice you'll know if its for you or not. Once you find out you like a juice, put it in a carto. After buying lots of gear i found that I realy like cartomizers, but they will run out of juice if u chain vape. Thats where tanks come into play, you can vape all day with no refills. Now back to the changing juice thing, I just buy a tank for every juice i like so i dont have to wory about it (The smoktech tanks are very good and inexpensive). Now when i go out i put like 6 tanks in my case and im good to go, if i get bored with a flavor i just change it out, no fuss.