I'm having a hard time getting good flavors from my fruit flavors from tfa. I start my test mixes at the recommended % . They are not strong enough for my liking but as I add more flavor it just starts to taste odd. I've had a few successful mixes but things seem to be weak flavored. 50/50 18%nic. Using a nautilus tank, vamo v5 3.3~3.5v 7~9watts.