LONDON (Reuters) - The problem of dog dirt littering Britain's streets and parks could become a thing of the past thanks to a new spray, a retailer said. "Clear-up spray is an aerosol spray that freezes any horrible, messy dog doo and transforms it into a solid, hard lump which can be easily picked up," explained Nick Westcott, managing director and founder of The Animal Health Co Limited. The spray, which sold for 3.50 pounds ($5.72) at Crufts, Britain's premier dog show, will normally retail at 5.80 pounds for a 400ml can. "Dog wardens are raving about it. It's transformed their lives," Westcott said. The spray is made by CCL Industries Ltd.