How to remove a broken bulb:
• Use leather work gloves and safety glasses, in case the bulb shatters.
• Take a raw, unpeeled potato or a bar of soap and press it into the base of the bulb and give it a good twist.
To prevent the new bulb from sticking:
• Clean off any rust or corrosion from inside the socket with an emery board.
• Lightly coat or mist the internal threads with lubricant that will conduct electricity easily.