How do you guys swap flavors? I don't drip so swapping flavors is a pain in the .......I use a vivi nova, a DCT tank, and a clearo. The DCT tank would be the easiest to swap flavors with but it seems so expensive to change cartos that often. Do you guys just fill it back up with a new juice? Or do you use a brand new carto? Or do you clean your other carto so you can use it fresh again?