A friend of mine has had exchange students over the years and loved them. When a friend asked her to take in an American girl for a few months she agreed..and bitterly regrets it now.
The Japanese girls were well trained in cleaning up after themselves and did everything she told them to. Well trained with lovely manners they were and will be welcomed again at any time she wants company.
The American girl? She had been raised like most of our kids...brought up to feel entitled to what she wanted when she wanted it, and as for housework or cleaning up after herself, that was for someone else to do.
I strongly suspect my friend will never again take in an American girl, only foreign ones.
Which leads me to wonder..what do your younger family members do when they visit? My GKs all pitch in and help with housework when visiting, (one GD helped put down carpet squares and helped paint the house) and my kids do most of the work when THEY visit, giving me a mini vacation.