Thanks to all for the useful tips. Even after spraying, I couldn't get the key to fit into the lock and as I stated earlier, it hasn't worked since I bought the car few years ago. I picked up a door lock and key from a junk-yard V-70 reasonably, and installed the lock into my door handle assembly. It was a fairly simple operation. My daughter will have two keys on her ring now, but at least she can unlock the door manually if the fob doesn't work. She installed a new battery in the fob when this all started. I guess that I will take open it up and check/clean corrosion and put a volt meter on the battery to make sure. Thanks again for taking time to respond to my post!