Lindgs m writes:

I am trying t replace a tube in a kitchen fixture. The old one was difficult
to remove. The new one will not totally seat in the fixture. Can some kind
of lubricant (WD40) be put on the pins to facilitate the installation?

I don't think so, but those posts that hold the lamp can be replaced.
While you are at it, take the fixture down, replace the lamp holders,
remove the ballast and put an LED tube in there.

You'll be happy you did and odds are, you'll never replace that tube again.

--
Dan Espen