The last few days I'd had to put some pressure to get the ignition key
to turn.  (I never knew the little button in the key is meant to be
pressed to release the lock when the steering wheel is turned to too
much of an angle when parked.)  Last night the key only turned a
little, then would get stuck and not go all the way, so I was unable to
start the car.  I put a lot of DW40 spray and dry graphite (still
sneezing and trying to clean off my hands) into the ignition keyhole
and waited a couple of hours, but it wouldn't work.  Then this morning,
after about a ten hour break, I went to the car again, and voila!  The
key works every single time.  The key comes back soaked with graphite
mixed with DW40 to a couple of inches.  Was this just a one-time
problem?  What is the nature of this problem?