VG will def limit TH. PG will increase it. It could just be the added VG your having a problem w/.
well this is how I mixed it I took the 3ml bottle that came with my order...and filled it 3/4ths of the way with the 18ml tabacco flave. then the rest with the vg (hoping to get more vapor) then 2 drops of the peppermint oil...Very good menthol result, great with my coffee in the morning...lol question would be, would I loose my added vapor output by eliminating the vg?