Hand sanitizers help get rid of germs that can cause COVID-19. When selecting hand sanitizers, make sure you choose one that contains between 60-95% alcohol. Also, when you use hand sanitizers, make sure to apply the liquid to the palm of one hand and rub it all over both hands until the sanitizer dries. This takes about 20 seconds. Be careful not to wipe the sanitizer off before it’s dry. That can make it less effective in killing germs.