Kohler Co. has introduced a deodorizing toilet seat that it says eliminates embarrassing bathroom odors and the need for candles and sprays to cover them up. A fan hidden in the battery-operated seat sucks in air and pushes it through an odor-eating carbon filter, followed by an optional scent pack. The $90 seat is one of many high-tech gadgets that Wisconsin-based Kohler and its competitors have introduced in recent years to make time spent in the bathroom more pleasant. San Francisco-based Brondell introduced one in 2006 but pulled it from the market about three years ago because the manufacturing costs were high and demand "wasn't where we had hoped it would be," said the company's president, Steve Scheer.