Ignition key hard to start?

Over the past 3 months it's getting harder and harder for the key to make contact in the ignition lock and start the car. I now have to fiddle with it and sometimes hold it all the way to the right in the cylinder to get the car started. Then everything works fine. The problem was intermittent and now is much more frequent.

Is there a fix without buying a whole new ignition lock and key, and then either having to replace every lock in the car or carry two keys?

Thanks,

Jon