Combine rubbing alcohol and pure aloe vera gel in ratios described above.
You may scale up both ingredients to create a larger batch, but maintain the same ratios (For example, it is okay to use 2 cups of 99% alcohol and 1 cup aloe vera gel. OR 5 cups of 60% rubbing alcohol and 1/2 cup aloe vera.)
Add a few drops of essential oils of choice, such as lavender, rosemary, eucalyptus, cinnamon, tea tree, citrus, thyme, lemongrass or oregano.
If using fresh aloe vera leaf, peel away the skin and use only the inner gel. See the demonstration video in the body of this article.
It may be possible to combine bottled aloe vera gel and alcohol by whisking vigorously in a bowl. We use fresh aloe vera, and blend it in a Vitamix blender. A blender is recommended for the most smooth and combined homemade hand sanitizer. It should not clog your bottle.
Once thoroughly combined/blended, add the finished homemade hand sanitizer to a travel size spray or squeeze bottle of choice. Note that this recipe will create a fairly thin, sprayable hand sanitizer (rather than a thick gel). Store the excess in a cool dark location.
Store the excess in a cool dark location. Fresh leaf aloe vera gel may turn light pink when exposed to light, but it is not "going bad". The alcohol effectively preserves it.