Gday kanda... :)
The best method Ive found over the years, is to use two decent microfibre cloths. One damp (with filtered water of course ::)) and the other dry.
Wait until your machine has cooled down and then wax-on with the damp cloth and wax-off with the dry one immediately afterwards. Do small sections at a time like this to avoid allowing the dampness to dry out, then your machine will always look like new. 8-)
No chemicals allowed near my Extra.... :P