Peter L. Krause wrote:
I recently picked up a can of PB-Blaster Teflon Lube... It is really fantastic for these sorts of things. The Teflon is carried in a very light solvent that penetrates very well, and evaporates quickly leaving the teflon behind. What's left behind isn't sticky, or greasy.Before following Jeff Greenfield's excellent advice, try spraying some WD-40 or other such lubricant down the opening at the rear of the glass above the striker mechanism (inside the door cavity).