The problem I have is the specs always say something like "Let me see that deck" (sometimes I can show them but other times I don't know what to do if I cant show it to them). Another one I get is when doing an Elmsley count or something like that they will say "let me see the cards"... Now what should I do?
It depends. The big answer is that you have to develop your presentational skills so that you are seen as the performer and they see themselves as the specs. But that is easier said than done.
So...You might say, laughing, "The answer to that is no." This might work if they are just asking for the heck of it, and they got caught up in the effect. You might also tell them that you will show them when you are finished. You might also just ignore them, if they are part of a group. If they are asking because your elmsley is unconvincing, work on your elmsley. If, however, they are just in the habit of asking annoying questions at every step of every effect, than find new spectators.
If you young and you are performing for peers, you may have trouble solving this problem, but keep a good heart, it will ger better.