I would remove the TB and clean it. It isn't going to hurt it. I would even strip off the TPS before using any cleaning solvents on it. Also, be careful not to get any cleaning solvents on the throttle shaft bearings. If there was a lot of carbon on the TB, you might also check the idle air motor, which is on the intake. That will affect idle if it starts to get gummed up.
-Muzzy