If it is a bottom coil carto it is really easy to rebuild. If you do a youtube search for rebuilding the steam machine atomizer it is very similar. Combine that with a video on rebuilding the Vivi Nova head. It is hard to explain I know this probably is confusing, my advice would be take a carto apart and see how it is put together. If you know how to roll a wick/coil you are 75% of the way there.