Stains/scratches on the flooring with a rule next to them so the size is known, pictures of the place being dirty with a statement from the cleaners you hired, etc.  

A little move in basket with some of the following :  assorted felt furniture protectors for the wood floor, a sponge, cleaner for a glass top stove if there is one, a small bottle of hand soap,  a couple of packets of dishwasher detergent, maybe a dishtowel, and a roll of paper towels,  windex or such. 

This eliminates double bookings and allows the cleaners to be aware of last minute bookings without a source constantly monitoring and updating. 

We recently had a guest ask for late checkout, we told them no because of our cleaner’s schedule, but they still stayed for an extra hour.

Your cleaners will be your lifeline.  

Especially if the tenants have small children, you have to clearly communicate what items are forbidden to go down the toilets (baby wipes, bleach cleaners, etc) and let the tenants know if they plug the system they are responsible for having it cleaned out/pumped. 

They agreeing to findings.2. complete repairs found by inspection and deduct from deposit3. clean carpet if they don't provide a receipt from a local, professional cleaner which is the condition they received it in. deduct from deposit if they didn't.4. if a pet was allowed, they must turn in a receipt showing it was treated for fleas. if If they dont it comes out of the deposit. if any damage from pet they're given an estimate of repair and sign an agreement that they will pay any excess not covered by deposit.5. touch up painting as needed, filters changed, fire alarm batteries updated.6. get keys from tenant and change locks. old locks go into inventory to be used in other properties.7. return their deposit with a letter documenting what expenses were paid out of it and a notice that they are welcome to return if they were a good tenant. they can use the statement for their future landlord as well. if they were not a good tenant, they go on a do not rent list for future reference with a copy of mive.iut inspection signed by them indicating damages and/or non-compliance behavior.

I'm the same as everyone else, 5-stars, and it did take my cleaners a while to understand these are not personal homes, but basically a "business home / hotel". 

The carpet has been soiled and they hired a carpet cleaner, but some of the spots are coming back. the wood floor on the first level has also been scratched and their is a slight urine smell.

@Julia Fair I am working with a cleaner in the area, and I have an on-call maintenance person.