If your punch is "frozen" in place, one method which works well is ironically enough, to place it in a freezer for a period of 30 minutes. The cold air will cause the metal to contract and could free the die.
You can also press the die from the bottom end to force the button to pop back up. In most cases if your punch is stuck, it generally does not mean it is broken.
Certain factors may increase the odds of a punch sticking, including using very thick paper like business or loyalty cards, punching with very small and/or intricate designs, and/or punching through materials others than paper.
If you find this problem continues, or the blade seems permanently stuck, please contact us for a replacement. We will replace defective punches which do not work properly in accordance with our recommended media. Please see our warranty page for further information.