I wonder how long it will be before someone markets a dish detergent specifically for soaking prior to washing up. Never mind how necessary it is - deodorant wasn't "necessary" until it was for sale, and for a long time there was one type of soap, rather than the definitely non-interchangeable hand soap, face soap, body wash, shampoo, laundry soap and dish soap we have these days. If someone can convince enough people that a soaking detergent is a good idea, it will start to sell.
Mokalus of Borg
PS - If nobody is doing that already, then patent pending.
PPS - I'd probably start with dishwasher powder.