Easiest way to clean it is to remove and then just spray using the little plastic nozzle included with this
http://www.nulon.com.au/products/Aerosols/Throttle_Body_and_Carby_Cleaner/#.T5SeW6uP_qc
I used it on the Magna's TB last week which had what looked like a chocolate mud cake on it.
Just sprayed (no wiping) and it all came off, was quite impressed actually. Then just soaked up any excess fluid with a rag, let dry for 10 mins, all done