If you want to clear up the oil in the intake thing while the intake is still on, you can just squirt some throttle body cleaner down the intake while the engine is off... don't go crazy with it because it will stall the engine if you use too much and it will have trouble starting. It easiest if you have someone hold open the throttle blade while you spray it in...
Note I did say throttle body cleaner and not carb cleaner... Throttle body cleaner is supposed to be safe to use on an engine, and won't foul out your O2 sensors.