sorry but I am having a mind blank. If my nic is 100mg and I want to make my juice 18% nic, on the top 3 lines for 1 I put 90% PG (which is what my nic is), the second box automatically puts 10% pg. For Nic I put 100mg right and of course put 18% for what I want the mix to be?? The other thing is, I just purchased some nic which is 150mg. I don't really like working with that high a percentage. How do I dilute it? PG?? and if so, how would I get it around 50% I assume taking an empty 30ml bottle and putting 15ml pp and 15ml nic would do the trick?? Any help would be greatly appreciated.