I've put in many an hour cleaning and rebuilding carbs. Here's my tried and true procedure:
1) Completely disassemble carb. and put in a good carb cleaner overnite.
2) Remove from cleaner and wash all parts off with water.
3) Using compressed air, thoroughly dry all parts. Pay particular attention
to all orifices etc.
4) Reassemble with a NEW carb kit. Old gaskets don't work.
5) Remount to motor and adjust.