Copper pots can be a homemaker's worst enemy. They look beautiful when they're clean. But keeping them that way can be a nightmare -- unless you know the right trick. First, sprinkle a thick layer of common table salt onto the copper. Next, use a spray bottle to apply a small amount of vinegar. The copper will brighten before your eyes. Getting rust stains out of porcelain and china plumbing fixtures is just about as easy. You'll need a pumice stick and a small container of turpentine. Not paint thinner -- turpentine! Dip the pumice stick in the turpentine and rub the rusty area. And that's The On The House tip for today.