Zenith tank and coils

So my husband and I bought two zenith II tanks and inokin 1.6 ohm heads. My husband has not been impressed with the lack of flavor that it produces. Mine has been ok but I’m wondering if I need to clean the coil often? I usually use a nautilus tank and coil that I would clean each time I added liquid. Any help is appreciated as we bought 13 packs of these coils

Original source: https://www.e-cigarette-forum.com/threads/zenith-tank-and-coils.967117/