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UV sterilization works by disrupting the DNA of pathogens -- which is exactly the same mechanism that causes skin cancer. So I don't see this product arriving anytime soon.

That would be very cool. Could do it every time, instead of only when the operator remembers to.

I think it would be a great idea to do that, as well as somehow showing up how many germs are left on your hands.

Sort of like when you throw white paint around at a rave and everybody has got their hands in the air, glowing white skin and…

There are handwashing demonstration soaps that include an ingredient that fluoresces under UV light. You wash your hands normally using the soap then a UV light shows you how bad you are at washin your hands.

I've found only the off-brand ones feel sticky. The feel varies a lot from brand to brand.