I had some beaver castor in a glass bottle with glycerin for over 1 year and it doesn't smell like beaver castor has bad smell

What were your original intentions? Did you put the castor in green or dried it first?

What were you trying to do or expected to happen? Too many variables to give you a reply. Glycerin is not a solvent it is a popular antifreeze and used in some lures as a thickener. It has no odor enhancing properties.

I put it in green

I don't have a freezer so how is the best way to take care of the beaver castor so that i can use it for trapping beaver i use it on it on castor sets

john the simpilist way to put up your castor would be to hang them on a wire so that the castor doesnt touch it just hangs freely and let it dry for a couple weeks the first few days keep an eye out for flys that will want to land on them i sometimes place a fan on them the fist day to help reduce the moisture after a couple weeks i take them off the wire and cut them up with a sharp knife and place them in a clean container i then cover with glycerin and let soak to soften for 2 weeks then drain off the glycerin and set aside grind the castors twice adding the scented glycerin to achive the disired consistency if your grinder still has it lumpy at this point you could run the mix through a processor then add some sodium benzoate and some methyl parabin to stabilize and halt any mold growth
there is another method i use that involves red wine but that method takes up to a year to reach sweetness level

I try that thank you