Objective: To wash a plate

Which of the following solutions is more sound in terms of naive physics reasoning?

Available choices:
* use a dishcloth or dish scrubber and hot, soapy water. Scrub the plate with the cloth or scrubber, making sure to cover the entire surface of both sides of the plate, until all visible traces of food are gone. Feel all over the plate with your bare hand to be sure all food is gone.;
* use a dishcloth or a dish scrubber and cold, soapy water. Scrub the plate with the cloth or scrubber, making sure to cover just the front of the plate, until most of the food is gone or you can't taste any more. Look around the plate for any other things to eat.;
use a dishcloth or dish scrubber and hot, soapy water. Scrub the plate with the cloth or scrubber, making sure to cover the entire surface of both sides of the plate, until all visible traces of food are gone. Feel all over the plate with your bare hand to be sure all food is gone.