Procter & Gamble Co. will begin test marketing Febreze Fabric Refresher May 20. P&G said Febreze, which can be used on clothing or upholstery, uses a proprietary technology to trap odor molecules from such sources as cigarette smoke, pets or cooking. TV and print ads by Grey Advertising, highlighting situations where Febreze can be used, will run in the Phoenix; Boise, Idaho; and Salt Lake City test markets.