Do not use lock de icers cause they clocg up your tumblers.What you should get is a good penintrating oil and spray in ity.wd40 in not a good one.Go to a automotive store and get a good one from there.Once ytou sprayed it in there use the key back and forth several times..I would reaply it whenever it gets cold.This will help it from feezing and also kepps the tumblers lubed up