Making DIY hand sanitizer is not overly challenging for the official WHO guide see this.

For hand sanitizer to be effective, it must have at least 60% alcohol content, according to the US CDC.

Wired had two recipes:

  1. Gel recipe: Mix 3 parts isopropyl alcohol to 1 part aloe vera gel.
  2. Spray or wipe recipe: Mix 1 ⅔ cups alcohol with 2 teaspoons of glycerol. Glycerol keeps the alcohol from drying out your hands, but is inactive. Then mix in 1 tablespoon of hydrogen peroxide, then another ¼ cup of distilled or boiled (then cooled) water. (If you're working with a lower-concentration solution of rubbing alcohol, use far less water; remember, at least ⅔ of your final mixture has to be alcohol.) Load the solution into spray bottles. You can wet a paper towel and use it as a wipe.

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