How do you repair or replace this dash switch?

[Barney]

Recognize this?

These switches are on my Country Coach panel. They are yellow when OFF and change to green when ON.
Nice, at a glance you can see nearly every device throughout the coach that is on or off.
Problem is my FOG LIGHT switch "pictured" stays green all the time. The lights toggle on and off when this button is pressed, but
the color never changes. Makes you think the fog lights are on when they are not.
Then once you press it a few times you lose track and have to send the queen outside to tell you what you got,
unless its dark outside.
Anyone know how to remove, repair, replace one of these?

Thanks,

Barney