I had one stop working. Not only was my socket full of crap I have a slight crack on the yellow reflector, letting in a little moisture. So, I cleaned out the socket and went to buy a new bulb, but didn't have enough money on me to get it right then ($4.95 for two little bulbs from China?! I only had three on me.

). So I put the old bulb back in to keep the socket clean and the bulb came on. I really thought that I had seen the element open, but apparently was mistaken.
Those sockets are in a great location to get covered with all kinds of crap and putting new/better ones in sounds like a great idea. I hadn't thought of that, for some reason.
Merry Christmas... RT