What do you use to test ejuice with an MVP2? I have the iclear30 and a Protank2 and rather than cleaning them after trying each new flavor, is there a certain drip tip that you would recommend? I also have a Halo G6 with some cartomizers and was thinking of pulling the polyfill out and trying that too. I'm still pretty new so haven't done any rebuildable things yet, so something I could just rinse out after trying would work great. Thanks.