Maybe they have placed furniture too close to the return air intake?

This included all furniture, kitchen stuff, linens etc. 

Once you make the additional investment in furniture, you can earn at least 25% more on a rental.      

@Rafael Floresta when you stage are you allowed to keep the furniture (on a rental basis) for your airbnb or is it strictly for the pictures? 

Those items like kayak, paddle board, BBQ grill, lawn furniture, floor mounted pull up exercise bar, stationary bike...stuff like that which the tenants are free to take advantage of but it is not part of what the rent includes.I think hotels do that when they say they have "complimentary newspaper service, complimentary WIFI". 

If they get into any furniture, you are better of throwing it out.

started on 14k - brought 4properties in 13- sold two to make enough to get one Reno budget- sold that last year for highest price achieved in area  -brought two more- doing another Reno now- - in two years made enough to live off on rents and over 300k in equity- all from 14k and a tone of hard work, picking up old furniture off the road and turning into "rehab addict" like houses!  

Charging for clean up will be tossed out  of court unless you have photo's of furniture left behind and 40 bags of trash. 

They once offered up the basement for furniture storage for a charity drive... and also used the washing machine to wash about 20 loads of clothing they were going to donate. 

Mgt in place, furniture, etc