i allways charge double on first cleans in somecases ive charged more than double , last week i did 2 first cleans that hadnt been done in over 18 months and were really filthy for this house type i would normally charge £12 they both took over a hour to do , if i hadnt charged more for the first clean i would have earnt £24 for over 2 hours work , take away a few running cost , add about a hour for return travel time and im maybe getting £6 per house by the time everything is taken into account .
charge as much as you can for first cleans otherwise you minght aswell do them for free .