I just purchased a used 2010 Ford Focus. I love it! However, when opening the car door with the remote, the door chime sounds and continues till I insert the key into the ignition. Very annoying. The car salesman says it happens on certain cars. I've never heard of it. Do I need to disengage the chime entirely so it doesn't sound at all, even when the lights are left on, or is there something else I should do. Any help is appreciated. Thanks.