From Utah Preppers. Here's what they say, This has been an interesting experiment and learning experience. I set out a couple days ago to figure out how to make hand sanitizer at home. With an immune fragile child in our home, we sanitize a LOT! After doing copious amounts of research and extended experimentation last night, I believe I have found a reliable and effective way to make hand sanitizer at home. First, some background: To be effective, hand sanitizers MUST contain a minimum of 60% alcohol by concentration. Alcohol kills germs by dessication, meaning that it dries them out through rapid evaporation. A lower concentration of alcohol results in not having enough alcohol to rapidly evaporate and dry out the microbes on your hands. There are many recipes on the internet that result in an over-dilluted mixture which will prove to be very ineffective at killing germs. This works for me! If you want, you could add a few drops of your favorite scent.