Anyone notice this? one bottle I have is 40vg and 60pg. the other is 70vg and 30pg. The one with 40/60 has a lot of taste but sometimes when I exhale I get little to no vapor. With the other one, it has a decent amount of vapor but not as much as I'd expect from a 70 VG juice. and it has less flavor. What do you guys think is the best mix?