All of a sudden, I am having trouble removing the key from the ignition switch. WD40 helped a little bit but it is still a problem. Does anyone have a suggestion for a better lube - maybe some kind of graphite?
Maybe white lithium grease? Put it on the key and put it in and take it out of the cylinder a few times. I know a new key is sometimes hard to insert/remove because the cut areas are pretty sharp. Not sure why yours would start doing it all of a sudden though.
Be cautious with any greasy type lubes. They'll hold dust and grit in the tumblers. I use white teflon powder from local hobby shop. Graphite's great but can be messy. Dremel tool and wire brush will take any burrs off the key too.