2/3 91% alcohol
1/3 water
A few drops of favorite essential oil
The 70% alcohol will do as well. 2/3 that to 1/3 aloe Vera gel (found at target in the skin care aisle). Add 10-20 drops of any essential oil, optionally, but oregano oil is antiviral so will be great.
I make hand sanitizer all the time now, and refill the little hand sprayers.