If you look at the throttle butterfly, you will see two or three idle discharge holes just in front of the throttle-closed position. Nearby you can hopefully find the idle mixture screw. The bits most likely to need cleaning are from the discharge holes to the idle mixture screw. By removing the mixture screw and squirting carb cleaner into the threaded hole, hopefully it will squirt out of all of the discharge holes. If it doesn't, you may have put the carb cleaner into the main mixture screw hole.
