I am very sorry for the 3 stars for cleaning. I kindly ask you to let me know what problems you encountered or what caused you trouble, just to allow me to improve and pay more attention to future guests.
I usually block the apartment one day before the arrival of guests to have as much time as possible to devote to cleaning the apartment.
This unfortunately doesn't mean that I am perfect and can't make any mistakes, but 3 stars worry me and I am very sorry that you have found something that has ruined your stay.
About the mosquito spray, I think it's a good advice. As you saw, we put the screens on the windows and I'm organizing for the two big doors but unfortunately, the area of the Valdarno is very proliferate for mosquitoes, especially after a few days of rain.
All the Best to you and your family, and sorry again.