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

Another Explanation, is that bacteria will adapt to hand sanitizer over time, while washing your hand is also a mechanical process and is much harder for bacteria to resist.

So when you have a choice, wash your hand, if not, use hand sanitizer.

PS: When I say resist, it’s more like survival bias, only the bacteria that survive hand sanitizer (0.1%) will stay on your hand and multiply.