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Be sure to enter the NES/Pioneer Valley Arms February Giveaway ***Smith & Wesson SD9VE 9MM***
Pop off the side plate and give it a good scrub inside.
CAUTION - Do not try to pry it off with a screwdriver. Remove all the sideplate screws, and the grip, and hold the gun by the muzzle while whacking the grip portion of the frame with the plastic handle of a screwdriver, plastic mallet, or something else non-marring. The sideplate will work out slowly and without buggering it up by prying.
Given the age of the gun, you may need to replace the trigger rebound spring while you have the sideplate off.
Do you think S&W would replace the springs in the gun? For a fee of course. Im not that great at working with revolvers.
I always get a laugh out of these instructions; "beat the pistol with a hammer!" This is, however, the only way to remove the side plate without damaging it or the frame.
Here's a step by step. http://www.thehighroad.org/showthread.php?t=397027
Here's J Frame video http://www.youtube.com/watch?v=JIUfmg1JulE
http://www.youtube.com/watch?v=ATrz7SSbpAk&NR=1