I see these commericals for products that disinfect surfaces - how long does it take for the germs to return?

Answer 1

I would think it depends how long it would take for something germy to pass by. If someone touched it with their hand or put a book down on it, the germs would be back. Not to brag, but I never use those products and I haven't had a respiratory disease like a cold of flu, since 1992.