DO NOT use WD40. Sewing machine oil is the stuff to use – it won’t damage the fabric. Better still, try a Metolius cam maintenance kit. I guess you can get them in Australia…

http://www.backcountry.com/store/MET0204/Metolius-Cam-Maintenance-Kit.html?CMP_ID=PD_GOO001&CP=Google&CMP=KNC-Google&mv_pc=r101&gcid=S2000x136&keyword=Metolius+Cam+Maintenance+Kit&s_kwcid=metolius%20cam%20maintenance%20kit|670294184

http://www.metoliusclimbing.com/camlube.htm