Did you take your throttle body off when you cleaned it?
Either way, you can keep it on to fix this if you want. Just take a lint free cloth with some B-12 on it and completely remove the ring where the throttle plate rest inside the throttle body. Be sure the clean the top and bottom of the TB! Also, be sure the wipe the edges of the throttle plate really good.
Rule of thrumb, try to remove as much black as possible and do not use anything abesive.
