What is the reason for cleaning? Has it sat with fuel and turned to varnish?? Has it taken water and gunk in? Different methods for different reasons.
FWIW: Unless you fully understand all of the carb workings " DO NOT BLOW WITH COMPRESSED AIR" you can damage needles and seats and float settings if you don't know where or what.
If you are mechanical, you can do as Husabutt says and diss-assemble then clean. Soaking parts in a good brand of carb cleaner will remove varnish almost instantly, Remove all gaskets and seals/orings ect. as cleaner is caustic. I don't agree with simple green as it will not remove varnish, it does work well as a cleaner but you have to scrub.
If you want to soak than use a cleaner such as injector cleaner as it will not hurt seals and works well with plastic parts, not as abrasive as carb cleaner.
