I just take a can of sylocone spray with the little piece of tubing in the hole and just drench the thing. Stick the little plastic tube in every nook and cranny and flood the thing. Work the action open and closed and spray in every nook and drench it. Then I take a can of that air in a can that you get to clean out your computer and blow in every nook and cranny cleaning out the crud. If it doesn't cure it... do it again. Usually works fine the first time.