AC on third floor - how cool should it get?

[Ashley Bartlett]

We have a three story triplex in Norfolk, VA, and the top floor unit is a small one-bedroom. Here in VA it is very hot right now! The tenant is complaining that the AC is not cooling enough. What is considered "enough?" We live in a three-story home just blocks from the rental property and our third floor is not very cool. We use a fan up there and it's still not great. I'm just trying to determine what responsibility we have to tenant to get it cool enough. I want to be fair for sure! But I also feel there's only so much you can do. Thanks for any advice!