The use of a Hair Dryer happens in the Quantum Leap episode - Double Identity.
Primo and Segundo borrow a hairdryer from Teresa's salon and drive to Buffalo. They pull up at what appears…
I think people stopped using bar soap because of some mother's obsession with the idea that bar of soap should look clean after it a hand washing. that's when they invented liquid soap for the bathroom. Sadly, liquid soap is typically wasteful.
I remember that soap.
Eventually, my family switched to Irish Spring because it looked as if it should be minty.