So, I have dry hands and I live in a dry environment. As such, my cards slide very well against each other. However, this makes it difficult to keep doubled as well. I've tried the following: I've seen magicians simply pinch one side hard enough for the friction to keep it together, but it keeps slipping whenever I do it. When I do aerials with doubles or double-lifts, I try to press the cards together so they stick from either residue oil from hands or push all the air pockets out, but air keeps finding a way back in to separate them again. I've seen magicians put a doubled card on the table and nudge it forward with the cards sticking perfectly together, but whenever I try that, either the top or the bottom moves forward first. Sometimes, even when I hit it just right, the top spins around. Could anyone give me a few pointers to keep doubled cards stuck together without having the grip opposite edges or corners? Thanks!