I like to make a sanitizing spray to clean my work surface before and after formulating.
My Sanitizing spray consists of 70% Isopropyl alcohol, 19% Hydrosol or Distilled Water, and 1% of Essential oil.
I typically make this in a 500ml amber glass bottle with a trigger nozzle, as not only are these better for cleaning, but the trigger nozzle lasts much longer than atomiser bottles (the kind used for room sprays and aromatic mists).
So for a 500ml bottle, the formulation is:
- 350mls 100% Isopropyl Alcohol
- 95mls Hydrosol or Distilled Water
- 5mls Essential Oil Synergy
Tip One:
For the essential oil, use your cheaper essential oils. In Australia, I can get 100 mL of Tea Tree, Lavender, Lemon, and Eucalyptus australiana for under $20 AUD each. I can even get a 250ml Clove Bud oil for $22.00 if I decide to add that.
If an essential oil has expired but still smells good, I won't use it clinically if it has expired by more than 3-4 months past expiration, but I will still use it in my cleaning product.
Tip Two:
Instead of always measuring your cleaning formulation, simply measure out your hydrosol/water first and pour this into your bottle. Print out a small label that says water or H2O on it and place it onto the bottle so that the top edge of the label lines up with the water level.
This way, each time you make a new batch of sanitizer, you will always know how much water to add to the bottle.
Use disposable pipettes that have mLs written on them to draw and dispense your essential oil synergy or use a 5ml (1ml increment) graduated cylinder.
Top off the rest of the bottle with your Isopropyl alcohol.
Due to the high percentage of alcohol, no preservative is required, and this spray will have a very long shelf life. It's a good idea to wear gloves whilst using, as the alcohol can dry hands and potentially lead to contact dermatitis, plus the alcohol will cause the essential oil to penetrate and be absorbed into the skin more rapidly.