I keep a bottle in the car and use it every time I come out of a public place.
I don't think this is always bad to use but I think this stuff, along with antibacterial soap, are actually going to be part of the problem and, not the solution, when the microbes mutate.
So do I and also carry some in my purse.
If it is alcohol based you could be doing more hard than good. Studies i've seen indicate that the alcohol kills beneficial bacteria needed to fight the bad stuff.