If hand sanitizer kills 99.9% of germs, what stops us from using that all of the time instead of hand washing?

Question

If hand sanitizer kills 99.9% of germs, what stops us from using that all of the time instead of hand washing?

In: Biology

Answer 1

It could kill 99.9%. But it rarely does.

The claim assumes an absurdly long exposure period. Like 3minutes to achieve maximum sanitization. You would need to bathe in the stuff.

Not that 20seconds is worthless, but its not 99.9% effective either.