Thought I had it sussed. Since I'm using a 75/25 pre-mix base I've been just putting about 3/4 of the base (in a 6ml bottle) and then adding 4 to 6 or so drops of flavoring. Worked the first time. But now, just doesn't do it. Actually had a kind of plastic taste to it. I thought because I was using a pre-mix I could get away without calculating everything. Not working. Tonight I'm cheating and adding my Nicquid flavors to my own (tastes great, I must admit). I guess my question is how would one use the e-juicemeup calculator (which I love) if you're using a pre-mixed base?