At a lecture I was doing, someone brought up a good point during my creativity/character portion
The first method you devise for an effect might not be the best.
His reasoning is that the first choice might work and be the most logical, but because of that it might also be the most logical for a non-magician. That can also be the problem with anyone who has a little bit of magical knowledge. Nothing serious, but they know a magic or have spent too much time snooping the internet and happen to know what a double lift is.
If you don't get the reaction you want from a routine, it might be time to take another look at the method you are employing.