And there must be one in the basement too.Other things I failed in the past:1)Water heater pressure relief valve must have a metal pipe going to about 3-4 inches from the floor (plastic not acceptable).

So if the coil in the AC is full of dog hair because they don't change their ac filters, I make them pay for it because that is tenant neglect.

Feel the urgency you're going to feel in 6 months now and get the peddle to the metal.  10x your effort and find an Agent friend that can put in mass offers on your behalf but don't bombard them. 

No smoking in the house, maybe not even outside, no loud music (I added no Rap or Metal), minimal phones...You have to be the leader and make them respect you.

Yes, running an AC when it is below 60d can cause damage to the coils and cause the lubricating oil to thicken too much.

We provide a three page "Move Out Guidelines" which details the cleaning required, from pulling out refer and cleaning behind/under it, to polishing faucets and other metallic surfaces to eliminate water spotting and fingerprints.

I even painted everything in and outside my office building with linen white and I put red metal awnings over all my windows on my office building and on every window for my apartment buildings.

We have the AC company come out every 6 months for maintenance; I already talked to them about cleaning out the coils the next time they're out which is in another 2 months or so.

Of course if you are somewhere where the "storm door" is one of those metal security doors with bars which would have a lock then of course you add one.  

Tenants said they saw him on the roof or in the hallway with a metal box of keys jangling.