you can also just use one of your Vivi nova heads in a new tank, just drop a couple drops directly on the coil, put the top back on and vape it one or two times. If you want to change the flavor, you can do one of two things.
Wash it off, pat the wicks dry and do a quick dry burn or just drop a couple drops of unflavored vg or pg on the coil, vape that, then put the new flavor on.