At 09:45 PM 12/14/2010, John Meeks wrote...
>This works for me:. Spray some WD40 on your key, insert key, repeat
>until
>key turns.

Ouch. While it might provide some immediate benefit, WD40 will really
gum things up over time. Alcohol is what's called for when unfreezing
locks, because it completely evaporates. You can buy small tubes
designed exactly for that purpose (sometimes with a bit of graphite for
dry lubrication) for under a buck. A thin lubricant, such as RemOil or
Kroil or maybe even PB Blaster, would be better than WD40, but I
wouldn't recommend even those, unless trying to free up a lock which is
already gummed up (as opposed to simply frozen).

One can also use the old trick of heating a key with a lighter, then
inserting it to thaw a lock.