This is not easy. The bulb is enclosed in a strong wire cage which I tried for ages to pull/prise off without success. In the end with the help of a small mirror and a torch I could see that the cage was secured by a single Phillips screw at it's base. I managed to loosen the screw and, pulling the cage at it's base towards the fridg centre, it slid away from it's restraint and could be removed from the bulb holder.