It’s best to use only professionally made and lab-tested Delta-8 oil to fill Delta-8 cartridges. This is made through an extraction process using various compounds found naturally in the cannabis sativa plant. This process includes heating compounds and using a solvent to essentially create a liquid version of the minor cannabinoid, Delta-8. This is then treated to ensure optimal safety and quality and infused with terpenes to create the contains of Delta-8 cartridges. This is a professional process that should only be completed by those that are qualified to handle these products.