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Author Message   Barnum Tinkerer Username: Barnum Post Number: 229 Registered: 10-2007 Rating: N/A Votes: 0 Posted on Wednesday, May 23, 2012 - 12:10 pm:    Hello. The problem is most likely caused by the original lubricant drying out.Since the shutter fires sometimes, suggests the problem is not that acute. This advice has been given many times. Try some lighter fluid. Do not flood it. Possibly use a bit of tissue to lightly wipe the blades. You never know, you might get lucky!