Fire safety company Kidde is recalling 500,000 smoke detectors that could put consumers in danger. A yellow cap left on during the manufacturing can cover one of the two smoke sensors and compromise the smoke alarm’s ability to detect smoke. About 452,000 have been sold in the U.S. at Menards, The Home Depot and Walmart. If a yellow cap is present, you should immediately contact Kidde to receive instructions and request a free replacement smoke alarm. We have a link to all the info you need to determine if you have one of the smoke detectors in question.