Another guest noticed the exact same thing but it appears that when the owner or manager of this location is away the staff does play.
The first thing I noticed was that the floors were indeed sticky and it looks like there were footprints coming and going away from the restroom.
Nastiness also included overflowing trash bins in the visible kitchen area and I saw a pimply faced kid (one of the kitchen staff or cooks) throw french fries that were left on a tray on the kitchen floor instead of the trash can.
Also, the staff (since the manager or owner was not there) was chatting up a storm about dating from what I could hear and were not truly paying attention to the customers.
This location was empty when I visited and I see why. Even in the backwards Phoenix area people have standards and going to this location would be a one-time event (with the nastiness and lack of attention to customers from staff)
Fail