Have you entered your pin code incorrectly a few times, now it's blank?
If so, the lock may have gone into secure mode, where it doesn't power on for 2 minutes. Please wait. While you wait, check your booking in up to date and you are opening the correct locker.
Heat activated
If you have cold hands, try rubbing them together to warm them up. Rest your finger on any number until the screen lights up. These are not iPhone screens, please enter your code slowly.
Search for your booking in My Lock,, then click the 'unlock' button corresponding to the lock you want to open. You can open the front door, or your locker doors (while your booking is active)