my opinion as cabin crew is that it doesnt take a lot to keep the FD tidy in the first place,just a plastic bag.when you get rubbish,put it in there!!!!!or when we come into the fight deck,gives it to us!!if you eat something that leaves loads of crumbs,try and get them onto a napkin instead of the seat & floor.its common sense,so why is it so hard for some flight crew to keep it tidy?sometimes i go in there and theres cups along the side of the seats,banana skins and sandwich wrappers on the floor,half eaten chocolate bars and some of them expect us to come in and tidy it all up.i dont mind if they pass it to me,but im not going in there with a bag and picking it up for them!!!