As far as hand washing goes, the thing you need to remember is that you’re supposed to soap up while not in the water stream. Getting it all lathered up basically breaks up and lifts dirt and other undesirable things off your skin, so it can then be rinsed off. If you’re rubbing the soap in while also rinsing, you’re just washing the soap away before it can do this as effectively, wasting time and water.
So, rinse, apply soap, lather up (without running water over your hands), then rinse again.
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