I would like to dilute some of my liquids because I'm getting too much nicotine before bedtime. I got "Humco glycerin skin protectant" at Walgreens and it has USP on the label, so I'm guessing it's ok. The active ingredient is 99.5% anhydrous glycerin, but does not say what the other 0.05% is. What is it, maybe water? Is it ok to vape?