Personally, I've never done it, so can't say if it will work......however, since it is easy to remove, top cover pulls off, think there is only one screw on top of unit, couldn't hurt to try.....
Problem sounds like it is inside the switch, not at the external contacts....
Like I said, just nudge the turn signal lever slightly up/down...if it starts to click that is your problem(ignition has to be on).....