Lightbulb changing tips
Have you ever tried to unscrew a burned out light bulb and found it stuck in the socket?
This happens mostly outside with a porch light or in a bathroom or basement where moisture is present. Over time, the moisture gets in there and corrodes the metal just enough to cause a bit of rust to build up and before you know it, the light bulb seems permanently fixed in that socket. Occasionally, a light bulb breaks off in the socket leaving a mess of glass and an even more difficult situation.
To avoid this corrosion in the future, put a thin layer of Vaseline on the metal threads before screwing it into the socket. This will create a barrier and you will avoid moisture-induced corrosion of a light bulb in a socket.