This recipe is the one that is recommended by the WHO (World Health Organization). You need to be in a well ventilated area when pouring the alcohol out into a measuring cup. The fumes are quite strong and you don’t want to be breathing it in for an long extended time. I used 100% isopropyl alcohol that I was able to order from Amazon and I dilute it using hydrogen peroxide, glycerine and distilled water for a 70% dilution. I don’t have any distilled water on hand so I used RO water or boiled water. I do not add any essential oils to this recipe.