syn11

Hey what's up ladies and gents. I've tried searching with no luck and not even googling has given me an answer I need. I gave a buddy of mine my old remote as I had newer ones. So when he programmed it to his car it actually kept my programming in it. So now when he unlocks/locks from the remote it triggers both his car and my car. Lol. Does anybody know how I can make the remote loose the programming to my car and only keep his? Is there a reset button on the remote by any chance? Or any steps to take? Thanks in advance.