Alcohol based or Non-alcohol based Hand Sanitizers work well?

Hi, well I recently did a science fair project and with my results I found that non-alcohol based sanitizers work better then alcohol based sanitizers. However, they do not work that well, hand sanitizers only kill the germs, consequently, they are still there, dead or alive. Almanza, associate professor of restaurant, hotel, institutional and tourism management, says "the typical hand sanitizer, which is usually alcohol-based, strips the skin of the outer layer of oil, which normally prevents resident bacteria from coming to the surface."

Hopefully this helps! ;)