ok guys,the father in law phoned us up the other night can i clean his windows from now on as he's past cleaning them-point is do i charge or not?to be honest for them i'm hung on the back of a door ready to do things as and when(they phone up once a year to ask about the kids etc,)don't get me wrong i get on with father in law-not the mother as can be expected (she's a tight arsed yorkshire woman)nothing wrong with that though but how can/do i approach this one?they'll expect not to pay but we're running a bussiness here-what do you think?