My ignition key has started to be very difficult to remove. Goes in fine but will not extract without lots of waggling and force. The key is gripped to the final bit of exit, indicating there is a poblem at the very entry of the slot. It has score marks and wear along its entire length and I am obviously mindful it could break. I have only tried lubrication spray,an he key is fully in the return/off position.

Advice or solution appreciated