See....
I must admit being a bit selfish here
I get the same problem at the hotel....
We charge a reasonable rate based on the assumption that guests wont abuse it. We dont have a keycard system and I have found if you ask guests politely not to leave the air-con on all day, they just ignore you and think they have the right because they have paid for the rent.
Well, I can live with that - what does make me mad is that the Brits we have at the hotel just do not seem to be aware of how to use the air-con in the first place.
As Anne rightly says... they leave the windows open and air-con on full.
When we try to explain to them it doesnt work like that, it usually backfires that the next day they leave the air-con on 24hrs and all windows and doors open
Private Rental cant be a lot different from the same sort of problems we have at the hotel....
Its just one of my problems with tourists
Merv!