I've had the subtank mini for more than 6 months now and the flavor is dull muted, unlike what everyone else seem to experience. I started building coils right from when I got it. My usual build is around 6 wraps, (0.7-0.8 ohms), 26GA kanthal. I usually vape max VG (70%-100%). I'm considering ditching this and going for a TFV4. Any suggestions on how to fix?