Recently I bought a kanger subtank. With the stock coils, and low ohm builds on the rba i was getting great flavour and vapor. Now i have changed the build on the RBA to a single coil 1.4 ohm, and for some reason the flavour seems extremely muted. Ive tried rewicking it several times, as well as cleaning all the components of the tank. Still i get nothing, Any suggestions? Thanks!