I can't say I've ever seen one stick. I have seen them get a bit of corrosion where the terminal plates touch at rest (door open) and the connection not go through. A little bit of sanding fixes that.
They don't really "go bad" otherwise, but you can break the switches if you're not careful. The aftermarket ones are junk, try to keep the originals in good shape if you can and attempt to clean them up to make contact.