I was informed that they are blocking the homes for 3 days after departure before cleaning crew goes in. Before next guest arrival the property inspectors are re-sanitizing the property ( remotes, door knobs, handles, surfaces etc.).
Its very important when booking to ask the reservations department their protocol and how they treat and departure but all of the companies i know of have something similar to a 3 day gap after departure. This clearly gives the cleaner a safer place to work to get the property ready for the next guest.