If you want to lock a DoseCan, turn the lock inside the DoseCan lid. You have to turn the latch towards the locket. Use a coin to turn the latch. When DoseCan is locked, use the magnetic key to open it.
WARNING: Do not lock DoseCan if you do not know where the DoseCan magnetic key is. The lock should be used only by personnel who manage DoseCans for citizens and have access to keys.