How well does cold water clean?

A man went to visit his 90 year old grandfather in a very secluded, rural area of the state. After spending the night, his grandfather prepared breakfast - eggs and bacon. The man noticed a film-like substance on his plate and he questioned his grandfather, "Are these plates clean?".


His grandfather replied, "These plates are as clean as cold water can get them, so go on and finish your meal."


That afternoon, while eating the hamburgers his grandfather made for lunch, he noticed tiny specks around the edge of his plate and a substance that kinda looked like dried egg yolks, so again he asked, "Grandfather, are these plates clean?"


Without looking up from his hamburger, his grandfather says, "I told you before, those dishes are as clean as cold water can get them. now don't ask me about it anymore!"


Later that afternoon, as he was on his way out to get the paper, the dog started to growl and would not let the poor guy pass. He complained, "Grandfather, your dog won't let me out!"


Without looking up from the football game, the grandfather shouted, "Coldwater.....MOVE!".