Thanks for the replies. When dripping, how long does it usually take to start to decline on average? I know it will vary, but this would be good to know. The reason I ask is I am trying to do something that I know I probably shouldn't do, which is to test several different juices before committing a cartomizer to them. I know that unless I clean the atty out between juices, that the flavor will be mixed a little, but as long as I can keep it relatively low mixed that would be OK for me.