I was just reminded of this old trick the other day.
When unscrewing an old exterior light bulb, the bulb busted and the light bulb socket was stuck in the fixture.
To fix and unscrew light bulb socket--1) turn off the power
2) cut a potato in half
3)stick the potato in the light socket and unscrew.
This trick usually works---if it doesn't get 2--needle nose pliers and do your best.
The potato worked on one light bulb, the needle nose pliers on the second.
That's your tip of the day.