- jeffc wrote:

I don't know why people are saying things like "wear goggles". If the
WD40 idea doesn't work, just put a sock or something over the bulb,
break it, then force the remaining base to unscrew with pliers, or 2
pairs of pliers (one on each side of the metal base).

Because wearing safety glasses is easy to advise and won't do any harm?

I've had some success gently working stubborn bulbs both ways, gradually
unscrewing them. If the bulb breaks, needle-nose pliers have been a simple
fix. I've always managed to use pliers without damaging the socket, so
I've never felt the need to try produce.