I've been having a problem for the last few months trying to turn the key from the 1 position back to the 0 position so I could pull the key out of the lock.
Usually I just have had to turn the key to position 2 and them back to 0 and it would come out fine. (didn't have to jiggle the steering wheel or the shifter).
It's not the key, both keys do the same thing.

Yesterday was the coldest it's been (+1°F) and I could not turn the key to 0, which meant the power to the headlights and instrument cluster would stay on and kill the battery in a fairly short time without the engine running.
I decided to let the engine run and turned the heat up to 80F. We were parked on the street, so I had to watch the car from the store for over 30 min. Finally after the interior warmed up the key came out. When I got home I sprayed a grease disolver in the lock cylinder and then some silicon lubricant.
It worked OK for the rest of the day, but this morning (+35°F) I couldn't get the key out again until the car warmed up.
Has anyone had this problem and was there a simple solution to fix it, short of taking it to the dealer?
If I need a new lock cylinder, are special tool required? I have lots of experience working on American and German cars, so the V70 shouldn't be a problem....I hope.
Thanks in advance.