Probably sounding embarrassingly clueless here, but how do I actually do the so-called washing machine maintenance wash? I've been inspired after a couple of recent threads and want my four month old machine to stay nice.
So far I've gathered to put it on empty with a hot temperature (I have 60 degree cycle - is that fine?) but do I put washing powder and fabric softener in the drawer as usual or do I just let the hot water work its magic on its own? 
Thanks all!