While our playing cards are vastly more durable than your every-day cheap deck of cards, we recommend washing your hands before use. This keeps your cards cleaner and slicker for longer because there is a reduced amount of natural oil on your hands are when they are clean. We also recommend not severely bending your cards and causing creases. Our cards are designed to bend and flex, but not to be crimped and creased. Here's an article on how to best care for your cards!