I usually just boil some distilled water, after it comes to a boil set it aside for a minute and then put your atty and cart in the water ( remove the fill from the cart of course and toss it) blow all the
juice out of the atty first from the battery end before the soak then swish them around in the hot water, I use a wood clothespin to do this. After about 15 minutes I take them out and you can just let them sit for 24 hours or so to dry or blow the atty out with a blowdryer ( I use a small spaceheater for 20 minutes). I used this to get the cinnamon flavor out from some nasty
juice I bought from the "Bear Juice" and it worked great. Don't forget to reprime the atty with a few drops of the juice you wiil be using.