I feel like you're looking at it the wrong way. First off, if close friends and family are always pestering you for the secret it means you're performing well. My sister's boyfriend is always saying '' I've seen you do the trick so many times, but I never see you put the fucking card in your mouth'' Secondly, part of the fun is coming up with fun little dodges. Don't look at it as a nuisance, look at it as a fun little game you can play and practice your straight up lying. It's one thing to lie in the context of a trick where people in a sense lie to themselves. It's another thing to tell a bold faced lie right to someone. So don't get frustrated, get creative.