You will need to heat the oil to get it out. I would some how suspend the cartridge over a pot of boiling water so the steam heats the oil.
Use a glue applicator with the long needle. Bstean Glue Applicator Syringe with Blunt Needle and Cap Industrial Grade Luer Lock Assorted Stainless Steel...
I am looking for all natural, no water, no alcohol fruit extracts to add to my oil. Someone was kind enough to give me some, however I can't seem to find where to buy more.