If the Max Hauri fix adapter (Art. 135805) has been fitted incorrectly and can no longer be removed, first disconnect it completely from the power supply. Then try to carefully turn the adapter back and forth while pulling evenly. If it does not come loose, you can apply gentle pressure with a rubber glove or rubberised pliers, but never pry with a screwdriver or metal, as there is a risk of breakage or short circuit. If it is still stuck, an electrician should safely remove the adapter. The next time it is used, ensure that it is plugged in straight and without pressure.