Soap is cleanness by friction and foam — the washing that lifts what water alone leaves. Washing hands of something names responsibility rinsed; the slipping soap, the cleansing that evades the grip; soap in the mouth, speech punished clean.
Positive Resonance
The accumulated lifted, hands honestly cleaned
Shadow Aspect
Washing hands of it, the slippery evading every grip
Nuances
Lathering up: the cleansing engaged
Washing your hands of it: responsibility rinsed off