A tenant just moved out and when I did the final walkthrough, there was a pet odor, but nothing too crazy.  

One house returned SATURATED with dog urine (skunk level odor-no exageration) sub floor buckled and black mold beneath carpets. 

Spotless and odor free usually means a move-in ready house fixed up for retail sale. 

I will be sending a letter requiring the cat to be removed.Alternatively, IF the cat is removed, and because they are otherwise good tenants and pay rent on time - I've permitting a new lease, if they are willing to put down a deposit that will pay for new wood floors and odor removal when they move out. 

Neighbor called regarding "strong odor".

The other tenants shouldn't be forced to live with an animal if they find the odor or presence offensive, are allergic, etc.

No harm no foul.

Even though they signed addenda that state AS IS WHERE IS, you might be surprised what people get away with.I don’t suspect foul play, unless the agent is dumb as rocks (further comment withheld ïŠ) and likes to play with fire.

He said anytime there's an odor, he paints everything with that silver paint and then paints over with regular paint.Has anyone heard of this?

There is NO harm/foul/indecency in renting your units for market value.