Daihatsu Charade 1.3 99 Rough idling and sound problem

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Hi all,
The problem is the charade is idling rough,cuts out and sounds really loud while speeding up.Ive cleaned the entire air filter system but no change,i thought it might be the throttle body but i dont know how to clean it.So can anyone please tell me how to clean the throttle body or if its another problem thanks.