Nest Thermostat Short Term Rental

[Lynette Guy]

I have a Nest thermostat in my short term rental cabin in North Georgia. I have not put any restrictions on it right now but in my house manual, I ask that the guest turn it to the AWAY setting when they leave and also State that at 11:00 am it will automatically switch to the AWAY position should they happen to forget. I also state that should they happen to still be home, they can feel free to switch it back to the HOME setting.

I gave a guest here now that checked in yesterday.  Check in is officially 4:00 pm.  She texted me at 10:20 yesterday morning and requested an early check in. I told her that was fine since the previous guest had checked had the day before. When I checked the thermostat, I saw that she had actually already entered the house before she ever texted me.

They had the air conditioner turned down to 68 and it ran for 12.5 hours yesterday. Ok, seems somewhat excessive to me, but you have to deal with some things. This morning it was switched to the AWAY setting at 11:00 and a few minutes later I noticed that it was turned down to 65.  

To me, it looks like they're being spiteful. All they had to do was turn it back to HOME, which had been set at 70.  

My question is, "Do I just leave it alone from this point and have an exorbitant power bill or put some sort of reasonable temperature control on it and risk a bad review?"

Thanks for any input and experiences that you've had in this situation.