This video shows how I use terpenes to clean my vials and beakers that I use to make THC Vape Juice. I like to use terpenes to wash them out so I can minimize losses from the concentrate stuck to the containers. These terpenes are then greate for mixing with concentrate again to make THC ejuice, continuing the cycle.
There are many other ways to clean your containers, this is just my preferred method.
Link to Amazon Syringe Filters:
Link to Terpenes: