Hello there! This is my first post and I need some help calculating the amount of nicotine to add to an ejuice I bought My favorite flavor is no longer offered in 12mg- highest they sell is 6mg now. I bought 60ml bottles of the 6mg nic and I want to increase the nicotine content to 12mg. I purchased a bottle of 100mg PG nicotine additive to use. How much of said nicotine should I add to the 60ml bottles to get *around* 12 mg? Also what should I use to add the nic so it is precise? Thanks so much, this isn’t something I want to do without consulting more experienced people first.