Since your AEG did not come with a cleaning rod, a good investment would be to pick up a real steel gun cleaning kit. Something along the lines of this:
http://www.canadiantire.ca/AST/brows....jsp?locale=en
Albeit you may need to find something with a smaller diameter cleaning rod if required.
And then refer to this thread!
http://www.airsoftcanada.com/showthread.php?t=95496