I recommend you add 1cc or 1.5cc of sterilized filtered grape/cotton seed oil to vial. Place vial upright in bowl and add boiled water until it reaches a little below plastic stopper. Let it sit for 5 min shake and repeat. This prop has a little pip however is decent enough. FYI

Ordered their Mast eth however was suspect of the no manufacture/exp date on Vial. Would seem like a good idea to have one ie professional.