I have to ask, why do you assume that people are using hand sanitizer instead of washing their hands? In the case of a pandemic, I would like to disinfect my hands mostly in places where there is no access to running water. Like, in my car after being in a public place, or at my desk.
This feels like the coronavirus-related version of that infamous Stack Exchange response where you say "I must do (thing) because of these requirements, what's the best way to do it" and people respond with "Don't do (thing), do (other thing which is arguably better but does not satisfy the requirements)"