The glycerin tinctures are worthless. They don't even say the % of CBD/THC. I make CBD rich alcohol tinctures and usually have good results. 50/50 at about 7% works best for me. I use the quick method of heating ground cannabis in alcohol. I doubt the age it in a closet technique works any better, just takes longer.

Glycerin has a very low amount of alcohol, so it takes forever to extract the CBD/THC.