Every home gets a few unwanted guests from time to time -- like tarnish and rust. But just because they came to visit doesn't mean they're here to stay. In the kitchen, copper pots are ideal for cooking because copper is a good conductor of heat. But copper also tarnishes, and it's not that easy to clean unless you know this old Carey Brothers' family secret. First sprinkle a thin layer of salt onto the copper, then apply a small amount of good old-fashioned white vinegar with a spray bottle. The copper will brighten before your eyes. Just don't use too much vinegar or it won't work. For rust stains on porcelain sinks and tubs, dip a pumice stick in turpentine (not paint thinner) and gently rub the rusty stain. And that's the On The House tip for today.