take cigarette lighter to the key, and see if it goes in better...

if not, get some brake cleaner and clean out the tumbler, then spray some wd-40 in there, and let it soak a bit, then clean THAT out with more brake cleaner...
see if it works better that way.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!