How well does cold water clean?

A man went to visit his 90-year-old grandfather in a very secluded, rural area of Victoria.
After spending the night, his grandfather prepared
breakfast for him consisting of eggs and bacon. He noticed a film-like substance on his plate and he questioned his grandfather... "Are these plates clean?"
His grandfather replied...."those 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 looked like dried egg yokes.... so he asked again...."Are you sure these plates are clean?" >Without looking up from his hamburger, the 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 him pass...
"Grandfather, your dog won't let me out," he complained.
Without diverting his attention from the football game,
>his Grandfather shouted . . . . . . >
. . . . "Coldwater, move!"