For the new DIY'ers. It's really REALLY simple. Prep your juice base w/ nicotine. If you have 100 mg/ml nicotine, to make 10ml you can measure 1 ml of the nicotine plus 15 drops of vodka and then almost fill the bottle with VG, to make a 10mg/ml mostly VG juice. Then drip in one drop flavoring for every milliliter of juice, so 10 drops. That's a little under 2.5% and works well for most of them. Shake and shake under a running hot water tap. Then leave in a cup of hot water for a while. End of story. If you can, set it aside for a few days to "steep" further, it will mellow out.
Fernand, are you causing trouble again?
Actually for NEW DIYers, I really don't agree with your information. I am a fairly new DIYer but I already know that working with 100mg nic is not the best idea. I would never recommend that to a newb. It is currently agreed that it is safer to dilute the nic down to at minimum a 36mg strength. I did purchase 100mg nic juice at one point, but the sight of me wrapped up in garb like I worked in a HazMat facility almost did me in (and my dog was staring at me in a funny way). I now pay a bit more but buy 36mg, or tops, 60mg nic.
Just my opinion, sweets.