You can use use Murphy's soap oil to get any dirt off, then as the guys have said - Birchwood Casey Gun stock oil - as used in the manufacturing process.
I tried out the little packet of Wonder Wipes that came with my new maple neck silo, and was impressed enough to go and buy a jar of them the next day. They brought back the white maple look after hours of playing had started to darken the neck. They smell nice too.
Does anyone know were I can purchase wonder wipes within Australia, either online or in perth. And are the wonder wipes labelled fretboard conditioner the ones you use on the back of the neck or is there a different set?