Leave the sideplate the hell alone unless you are completely familiar with how to remove it without causing damage...you are likely to do more harm than good.

If you suspect or can feel grit, dirt etc. in the action: remove the grips and flush the action with Rem Oil or similar...allow to dry and then add a drop or two of your favorite lube down beside the hammer, turn the gun over and do the same thing in the trigger opening. Using your fingers, spread a couple of drops on the exterior of the gun. Stop. Quit. Leave the poor thing alone.

If you are like most of us and admire them more than you use them this regimen should do you for a couple of years at least. My .02...YMMV