Just a little off topic but thought that I would mention this ...
American clients placed swimming clothes in my dryer.....and left them for more than five hours.
The weather outside in the garden was perfect....they would have dried in an hour.
Do your gite guests put their dirty dishes in the dish washer without rincing the dishes....or at least scrapping the food off them.....ouch,
Are the sheets stained with foot prints and sun oil?